S10 backfire through intake. Nov 18, 2009 · 1988, S-10 , Stock 2.

S10 backfire through intake The intake valve opens and ignites the new intake charge. Let’s explore each one in detail: 1. Save Share Reply Quote Like Nov 24, 2009 · OK guys, I've seen several threads about similar intake backfiring issues but mine is a little diffrent. You can rev it up a little more though and it will get past that Aug 28, 2012 · SOURCE: 95 Silverado backfires thruogh throttlebody It sounds very likely that it is going lean. If you did bend any valves it will be just slight and only difference you'll notice is your gas mileage. A quick check on Prodemand (one of our resources) shows the number 1 cause of backfiring through the intake in this car to be ignition related (coil, ignition module, spark plugs, wires) and #2 would be fuel pressure related (fuel pressure regulator, fuel pump). First is to determine TDC on #1 You say you have pulled the valve cover to determine that the vales where shut. It tries to with half throttle open It's actually a 95 an new plugs wires and plugs ol head blew plug out stripped hole so put use head an use intake on it. 10 gears LB. I can only move the car if I keep the pedal down to keep the idle high. This morning on the way to work as I was going up an on-ramp (uphill) to get on the highway, the truck began to sp Jan 21, 2018 · C6 Tech/Performance - Back firing through intake - Need some advice, I recently cam swapped my twin turbo ls3. It could also be a broken part internally, but the engine would tell you quickly if that was the case. when you give it alot of pedal it runs good but if you let off and try to just cruise then it starts to backfire. Was any recent work done on it? Check the firing order first. The manifold is located on the top of V6 and V8 engines. Whatever the cause, backfiring happens as a small Mar 11, 2008 · If it's backfiring through the carb or throttle body and runs, it's because it's out of time and the intake valve is still open during spark or because some huge carbon deposit may be hanging an intake valve up. when you let it idle its ok, but when you try to drive it it starts to backfire and sputter in the intake. 8 TBI ) A few of the 4. I'm out of town, and the wife drives it to a store, calls me, says it won't start, and won't turn over, and when it does, it's Feb 21, 2010 · i have a 1990 s10 with a 4. I can start the car and it idles good. So what I have done so far. Conclusion: Chevy S10 Backfire. that Apr 1, 2016 · It's actually a 95 an new plugs wires and plugs ol head blew plug out stripped hole so put use head an use intake on it. Jun 11, 2003 · Backfiring checklist: Revised 10-Oct-2010 to add check firing order and move cylinder balance test to end of test sequence Backfiring out the intake is either a valve stuck open or a lean mixture or spark plug wire(s) connected to the wrong cylinder(s). Under load it won't accelerated past 3000 rpm, really falls on its face from 1800 rpms up. Customer: 1995 s10 4. Could be a bad Mass airflow sensor or a fuel pump, maybe plugged injectors. replaced waterpump and optispark per forum members still Apr 2, 2018 · Ran kerosene through oil to clean valves, replaced oil, added rislone MAP sensor tested working TPS tested working Idles in park after warming up. install fuel pressure guage 40 lbs. I can not get it to start, it will just crank and backfire through the intake. removed clogged pre cats and main cat ( helped tremendously ) 3. i pulled over and sprayed her the throttle body and in the manifold with some carb cleaner and all seemed well for a couple of miles then back to the same thing again. The MAF seems to be ok. It will produce spark but not strong enough to ignite the fuel. 4 3v Expedition. Nov 20, 2019 · A bad timing chain or belt can cause your S10 to fire the spark plug too late in the timing cycle. i have changed the fuel pump and filter, distributor, idle air valve, fuel pressure regulator, coil, and the map sensor. wont even hesitate to break em loose in 3rd on dry pavement. 15 Year Member. Jun 29, 2011 · Backfiring through the intake/carb is caused by a valve being open when it shouldn't be or spark being delivered when it shouldn't be there. It’s hard to trouble shoot when there are multiple problems. backfires through intake Jun 30, 2017 · Just installed a 2005 4. What causes backfire through the exhaust system at idle? Whenever fuel and air escape from the cylinder to the intake or the exhaust manifold, backfires can occur. Oct 14, 2008 · Hi folks, I am still working on this S10 issue. Oct 5, 2015 · 1987 - 1996 F150 & Larger F-Series Trucks - 1988 5. I finally got a chance to do some work on it and this is where I'm at. Jan 25, 2002 · In the past few months i noticed my truck would backfire every so often through the intake. And I went straight to timing because ignition timing, valve timing, or maybe a bent or burnt valve are the only things I know that can cause a backfire thru the intake manifold. Re: backfires through throttle body 03-15-05 11:46 PM - Post# 649371 In response to CDAUSA I would change the fuel filter, yes, again. Feb 20, 2013 · 1987 - 1996 F150 - 1989 f150 5. Yesterday i started having issues with my engine, Erratic RPM, Wants to die, Hard starting, Backfireing through the intake. Tpis/IAC all set to perfect specs Can't figure it out and want to drive the damn thing. It lost a Jul 12, 2010 · C1 & C2 Corvettes - Backfire through carb - has backfired thru carb upon giving slight gas off idle creating a lot of white smoke from carb. The truck is a 1987 with the 2. After swap engine won't start and backfires through intake. Check compression on all cylinders and then look for vacuum hoses loose, cracked, or Oct 22, 2024 · Unburnt petrol and air exit through the valve into the exhaust manifold where it may ignite and cause a backfire sound to emanate from the tailpipe. Mar 1, 2010 · ( only intake was necessary but everything was in such great shape i regasketed the engine instead of replacing it with a used one ) 2. This only occurs under high revs when lifting,never when travelling. My jeep is fine as long as i just give it about half throttle. Nov 12, 2011 · 1988, S-10 , Stock 2. When I give it gas and try to accelerate, it boggs down, has little power, and then backfires through the intake. Thread starter B2Mann; Start date Dec 22, 2010; B2Mann Well-Known Member. Can rev gradually in park no problem. 9, 4. 6 liter engine. 3 V6 vortex Engine in it. i can hear the buzz sound when i turn the key and i actually took the hose off and made sure it flows gas when it turns on and it does. 5 stock with a 650cfm double pumper Holley carb. Feb 15, 2016 · Back firing through the intake is a timing issue or a burnt intake valve. Jan 11, 2021 · If the perceived backfire occurred it occurred in your exhaust system, not your intake system. installed vaccuum guage 21 inches at idle. I have went through the basics (fuel spark wires cap rotor plugs timing valves etc) but can't seem to pin point it. Removed carb and intake , I replaced the seals last season so I wanted to re-check. Dec 26, 2023 · Re: Backfiring through intake Post by 2grimjim » May 12th, 2024, 5:10 am SilverXJ wrote: ↑ April 20th, 2024, 1:40 am Those injectors are what I am currently running, so I don't think the injector selection is an issue. Jan 23, 2006 · Duramax Diesel Hesitation or Backfire 2005 Chevrolet Silverado 2005 GMC Sierra with 6. After doing a few checks, I Jan 24, 2021 · I can get it to fire for a few rotations, but it intake backfires non-stop and consistently louder until it finally gives a last backfire through the intake and dies. I have the same tuner for my 2017 silverado 5. . 5 out again before swapping to something else or doing a carb swap. You have gone to great lengths to eliminate as much as possible but something is still out of time or the intake valve is sticking open or being held open for this problem to occur. it has a TBI automatic 4x4 vin #z . at the same time i put in a lower temp stat installed an efan,replaced the stock coil to an accel power coil, and also changed the intake to open air. 0l backfires through intake - Hi everyone I am having this problem with my 1989 f150 5. Sep 27, 2022 · As mentioned above, if it's "backfiring" through the throttle body, odds are you're running lean causing lean pops. replaceing thie regulator fixed the problem for me, Ive went thru plugs/caps /rotors , even setting the timing and after replacing the reglator all runs well. it doesn't throw a code and only Dec 9, 2024 · Lastly, inspect for any vacuum leaks in the intake manifold and replace damaged hoses or gaskets. i asked a buddy of mine and he Dec 10, 2023 · The usual causes of intake-manifold backfiring: 1. 6, 2. 3l and found out the factory diablo tune is tuned to a specific truck they tuned and if that vehicle did'nt have a cold air intake the tune may not work for your vehicle it can cause a backfire through the exhaust. It Dec 4, 2007 · 1997 - 2003 F150 - Backfiring through the intake manifold - I have a 1997 F150 with about 150,000 on it. I've played with the timing and fuel ratios, checked compression, tried disconnecting the vacuum advance, everything I can think of. 3l was missing and backfiring through the exhaust. I noticed that it hesitated a little when i first left my house. J. Dec 13, 2014 · It idles really roughly, sounds like a diesel. When I drive it, it Dec 19, 2021 · Then you are going to have to see if all the intake and then all the exhaust move the same as the crank rotates. Check to make sure that the coil pack is not carbon tracking down the side of the sparkplug. Yesterday, I took the truck to the store and when I came out from the store I started the truck and it started backfiring through the intake manifold. Have you replaced the fuel filter? You can rent a fuel pressure gauge from Autozone, the schrader valve for the gauge is to the right of the distributor. The engine needs fuel to burn along with the air the engine is processing. Conclusion Obviously vacuum gauge readings cannot be definitive, but they can save a you a lot of time and money in chasing down obscure problems. Mar 19, 2010 · Small backfire through intake - 94 LT1 1118 Views 5 Replies 4 Participants Last post by manofthehour114 , Mar 19, 2010 Jump to Latest manofthehour114 Discussion starter · Mar 19, 2010 Apr 24, 2004 · C4 Tech/Performance - lt1 backfire through the intake when warmed up - tested all injectors resistance hot and cold 11. So i ajusted a/f scews and can lower afr at idle but as soon as you step on it it goes way lean and backfires. You don't get pop, pop, pop out of the intake or exhaust without a valve being a problem. I put an afr gauge on it and it goes way lean just over idle, like 20afr on rear cylinder 18afr front cylinder. Lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. Post by Matt Cramer » Fri Nov 20, 2015 9:21 pm Adjust the tooth #1 angle - the timing light is the final arbiter if it's correct. Spitting and backfiring are terms used to differentiate between the backfiring within the intake manifold and the carburetor (spitting) and backfiring through the exhaust (backfiring). Firing sounds all good. That unsettling noise and the fear that something might be wrong with your engine are all too familiar. Any acceleration causes sputtering and backfire through intake. i have replaced. Kick and Electric start Aug 11, 2018 · Okie is correct, backfire through intake is a "Lean" pop. It's not a bad idea to double-check your previous work. Reactions: mwilliams55555 , Road Trip , Erik the Awful and 1 other person Dec 30, 2021 · 02 F350 CC 7. If the exhaust is not opening, the compression will blow through the intake valve because it wasn't passed through the exhaust valve. Spray some WD-40 around the intake manifold at the head flanges with the engine idling, if the idle changes at all there's an intake leak. And going to pull all the smog off again once I can get it to running. I have check for codes with a computer no codes. First, I had set my valve lash the standard way with engine running half turns after rattle stops. Backfire through the intake indicates a lean condition. It will Oct 2, 2010 · 86 s-10 Blazer 2. You should get a trouble code such as P0011. Mar 27, 2016 · 2000 blazer backfires intake, fpr? Jump to Latest 1. If it's a Fram then I wouldn't be suprised if it was plugged up in only 3 months. Hope u put in a gm tensioner. 0 V6 - backfire through intake, little acceleration - I have an '89 Ford Ranger, 6cyl 2. Tim's Auto Repair. One common cause is an incorrect air-fuel mixture. You guys read it as "Well I don't have a nitrous kit so that can't be it. 85 K5 Blazer w/MAF TPI setup off a 87 Firebird. ive taken the egr off and cleaned it, seems to have Feb 7, 2024 · Unraveling the Causes of Engine Backfire through the Intake. Swapped an engine into this vehicle out of an 01 s10 with california emissions. that Jan 20, 2010 · 1973 FX frame chopped in the rear with rigid welded in place. replaced plugs,wires . It has an after market fluid balancer and Flowmaster shorty headers with 2. Injection back fires out the throttle body an won't start. Cam and Crank sensors are known problems. - 2007 5. When the bike warms up, after about 30 mins of riding, it starts to sputter and backfire through the intake. it's getting better (after new plugs, wires, o2 sensors, fuel filters), but i still have the problem. It runs pretty rough in general, the only time it runs well is when I am coasting downhill it is as quiet as a mouse and runs very smoothly. Feb 8, 2013 · The engine is now backfiring up through each of the intake runners. Checked firing order and flipped distriburtor 180 and it doesn't start but back fires through the intake at almost every revolution of the starter. 4 won't turn over, backfires through intake - my 06 f150, 5. Did you rock the crank back and forth to determine that you were accurate in that determination? Dec 14, 2013 · Just pressing the gas, will bog down and start backfiring through the intake Need help ASAP plz. First step, put a scantool on the vehicle and check the fuel sync and verify the ECU timing with a timing light and make sure they line up. Mar 1, 2010 · 2001 S10, 4. It has problems running in petrol and I was trying to start it directly in LPG and got a backfire, the air intake hat was blown up , and the air filter wasn't broken, just a little bumped. 5 l4 im when I crank the engine it back fires out of the tbi pretty badly. I have new intake manifold gasket,fuel components, plugs, gaskets but still get the popping. In this comprehensive guide, we will delve into the common causes behind an engine backfiring through the intake. Brightbox headlites. ive checked the tps,vaccum lines. runs perfectly at high speed (80mph) and idle. Lean fuel mix. 3's and two 2. 3 about 2 mos ago i went in and replaced all the plugs (bosch) wires, cap and rotor. Jul 30, 2009 · 03 s10 4. 3 L V6. 8 efi missing fire and backfires through intake - I have a 1988 F250 with a 5. Jan 18, 2010 · 1989 Firebird--408 engine, Stage 4 700r4 tranny, Strange Engineering 12 bolt rearend, GTA crosslace wheels, BFGoodrich drag radials, Spohn lca`s and relocation brackets, subframe connectors. Mar 4, 2003 4,014 Mar 11, 2012 · Hate to tell u. Try spraying some ether/starting fluid, around the perimeter of the intake while cranking. Why Does My Car Backfire Through The Carb? Your car may backfire through the carburetor due to a few key reasons. New plugs Wires Distributor cap Rotor button Coil all that stuff plus more. You either have to change the boot and the plug out or clean the boot and change the Nov 20, 2004 · Ordinarily, backfiring in the intake is an overlean condition. The lean mixture burns so slowly that it is still burning at the beginning of the intake stroke. Popping back through the intakes is caused by extreen leaning. All I did was replace the plugs, wires, clean cap and distributor with contact cleaner, replace leaking fuel pressure regulator and now it is backfiring! Back fire is a good indicator of a failed valve train, worn distributor gear, loose chain or bad timing. I put the old ICM back in, cleaned and greased all electrical contacts, took the intake elbow off and sprayed starting fluid in there and tried to start it. Jan 6, 2019 · The trouble I'm having is when it's under acceleration, I'd say about 1/2+ throttle, more so under WOT. Internal combustion engines run on a mixture of 14 to 1 which is fourteen parts air to one part fuel and when this is not correct (not enough fuel) the result will be Jul 15, 2008 · A Lean condition can cause backfiring or popping back through the intake. it starts up and idles but when i give it some pedal it starts to backfire through the intake, it does it worse when going from idle to about 3000 rpms and not as bad from 3000rpms and up. There could be several reasons why the intake system backfires. 3 that is backfiring through the tailpipe, and intake as well, your exhaust is heating up, your muffler has torn apart from backfiring, You may want to invest with a spider pump. 9-12. Jan 29, 2024 · Backfire through the topend usually either timing (which you checked) or the firing order, I would double check the firing order of the coil packs. RacEoHolic330 I like to dress like a pretty girl. Feb 27, 2005 · when i gun it in neutral it backfires through the intake, then studders through the first 750-1000 rpms and then is fine. and it has had this problem ever since i bought it. This can be caused by carbon tracking in the distributor or spark plug wires mixed up. 3 V6 Engine code W, 4x4, Automatic, 135,000 miles. Leaking intake valve. So I have to guess that an intake valve is open when the spark plug fires which ignites the fuel/air mix back through the intake system. the truck had been sitting up for about 3 years. Not much but do a compression test and I can bet money you leak slighly through the intake. This is all in an S-10 pickup. Mar 19, 2010 · Small backfire through intake - '94 LT1 Jump to Latest 2K views 4 replies 5 participants last post by LXtasy Mar 31, 2010 Aug 4, 2010 · 1987 - 1996 F150 & Larger F-Series Trucks - 95 302 backfires through intake - 95 f150, 302, auto trans, backfires through the intake at 4000rpm under load while driving, it idles fine and runs good at lower rpm's, we have checked fuel pressure and for vacuum leaks both seem to be ok, any ideas what it could be, Jan 17, 2013 · on my way back home she didn't want to accelerate at allonly under 2k rpms, anything over 2k she would struggle and backfire from the intake. when its cold it runs amazing. May 24, 2011 · Check your fuel pressure. I backed off the half turn to only quarter turns to see if this would help. Oct 16, 2010 · Backfiring checklist: Revised 10-Oct-2010 to add check firing order and move cylinder balance test to end of test sequence Backfiring out the intake is either a valve stuck open or a lean mixture or spark plug wire(s) connected to the wrong cylinder(s). Aug 21, 2011 · For an engine to backfire through the intake, the intake valve must be open at the time the air/fuel mixture ignites. Jan 9, 2021 · My 97 s10 started backfiring through the intake I have replaced the following within the last month fuel pump, fuel filter, iac,tps,icm,coil,plugs,wires,cap,rotor, distributor,map,egr gasket, egr tube, I have checked for vacuum leaks can't find any also cleaned the Mas, I'm about to give up any ideas need help with this one replaced head gaskets and all other top end gaskets about two months ago It is necessary to understand the intake system in order to see how backfiring occurs. I let off the gas and slowed down to 55 and the truck was fine. 8L TBI 1984 xcab s-10 3. 4L GM crate engine 91 S10 TBI swap w bored intake, Edelbrock headers. I double checked the crank and cam gear were ordered a rebuilt Chrysler 318 long block online put it in the car and it ran okay for a month and then started backfiring through the intake every time the rpms go up. 9 does it. 3l into a 2001 jimmy, engines starts fine and idles fine (650 rpm). 25 exhaust all the way out and Thrush ultra flow mufflers. If revving up suddenly it bogs and backfires through the passenger side of the throttle body. 2002 chevy s-10 4. 5 stainless exhaust, Quickor Ft Springs, Belltech spindles, Rear Possie's Monoleaf and C-section. When I pained the tank I replaced all of the internals, pump, regulator, filter before sealing it up. Posted 22 Feb 2019 04:32 Mar 23, 2009 · Backfiring Through Intake Jump to Latest 37K views 13 replies 11 participants last post by DallastheJeeper Feb 3, 2014 The roller rockers are 1. May 19, 2022 · 1987 - 1996 F150 & Larger F-Series Trucks - Hesitation with backfire through intake on acceleration - 1990 F-250 4WD Auto. I have a 2001 chevy S-10 pickup 2wd 4. If I accelerated to get back up to speed it would backfire though the intake and missfire like crazy. The fuel pump was replaced and I was only hitting on five of the six cylinders but ran suprisin May 22, 2018 · I understand where everyone is coming from. " Jan 1, 2007 · Our 96 S10 4. S&S super E carb, Andrew B grind cam. Background. Mar 4, 2003 · This will ignite the fuel with the intake valve open = backfire through the intake . Has the distributor ever been removed? The camshaft position sensor and crankshaft position sensor control the timing, are they in good condition? The P0305 code indicates a #5 cylinder misfire, how does that plug look? Mar 23, 2009 · Backfiring Through Intake Jump to Latest 37K views 13 replies 11 participants last post by DallastheJeeper Feb 3, 2014 Jul 7, 2019 · Did you figure out what was causing it. The air leaks this problem has created, has contributed to many a dusted engine. Custom exhaust, shift kit, e Oct 15, 2017 · Two days ago, I stopped by advance on my way home from work (needed power steering fluid for a little job on my minivan), and when I tried starting my Kingpin, there was a tremendous backfire through my intake, and then it took a few attempts to get my engine running before I was able to head home. Mar 12, 2013 · If the spark is directed to the wrong plug it will backfire because an intake valve is open when the spark is sent to the wrong spark plug. Woods valve body ATS turbo housing. May 30, 2012 · Put it in first gear and started down the road shifting gears and so on. I ALWAYS pull smog Jul 13, 2006 · 1997 1 ton pulling 35 foot fifth wheel. Kick and Electric start Jul 12, 2010 · C1 & C2 Corvettes - Backfire through carb - has backfired thru carb upon giving slight gas off idle creating a lot of white smoke from carb. 2" Rough Country Lift. AFE stage 2 intake, 4" AFE SS exh, 6. 0l 4x4 the problem just started this winter. It is backfiring through the manifold and has a hesitation off idle and through about 2000 rpm. The slow burn of the fuel mix means there's still fire in the chamber on overlap, and it ignites what's in the intake port--and then the rest of the plenum. Oct 31, 2010 · But if i step down on it it backfires like crazy thru the intake so hard it bley my filter off it will do it over and over i have replaced PLUGS,WIRES,USED MAF,FUEL FILTER,AIR FILTER, all this started when i let a buddy of mine seafoam the car while i was in it reving HE USED THE WHOLE THING, after i told him half so does anyone have any idead May 29, 2008 · i recently got a 91 chevy s10 blazer from a relative. Dec 10, 2007 · hey guys i just bought a 86 bronco with f/i 302. 2 backfire through the intake? Posted by Zack Live on Apr 01, 2016. 3 runs rough/backfiring through exhaust with very strong rich smell. 8. 73 4spd trans. Oct 21, 2008 · I am currently trying to diagnose a problem with why my truck is running poorly. Please let me know. It will not start unless I hold the pedal down, and occasionally while it's cranking it will backfire and eventually start and occasionally throw a P0335 Crank position sensor code when it backfires through the intake but won't start if I don't hold the pedal. Joined Jun 28, 2009 Messages 66 Reaction score 0 Apr 25, 2024 · The #1 reason for an engine backfire through the intake manifold will happen under load or acceleration. I checked fuel pump and its working fine. The backfire only occurs under heavy throttle in park and when it is under load and you try and go WOT. Dec 12, 2009 · It started to backfire from the intake and lost all power to keep me at 70 mph. 8, 2. Bike is in great shape, never dropped or wrecked. Jul 31, 2003 · 2. Several scenarios could cause this- moisture in the distributor cap or a bad cap, plug wires out of firing sequence, timing off/jumped timing chain or a stuck valve that is not closing completely. 8M posts 195K members Since 2001 S10forum is the Sep 6, 2016 · I checked for fuel pressure at the schrader valve and got 58-60 psi with key on and during cranking. Sep 4, 2014 · Backfire through the intake is a rich condition, through the exhaust is a lean condition. Changing plugs only won't fix this as the carbon gets transferred to the plug boot as well. Check the distributor. 2. I did full tune up changed fuel pump idle control knock sensor fuel filter - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. NON WORKING POS FASS fuel filter sys. However, I still have the problem of no start when hot. (Its not exhaust) I have replaced the plugs, cops, both cam sensors, compression test around 180 Aug 28, 2021 · I'm at my wits end. Any good answers? Jan 2, 2010 · It is completely stock. 3 Answers Replaced fuel filter, fuel pump, plugs, wires, distributor, ignition module, crank shaft sensor & leaking water pump. Aug 13, 2023 · Leads to high idle speed, causes lean running which accounts for backfire into the intake manifold, and decreasing idle until it stalls. 8 efi. It could be loose. Put it in gear or put a load on the engine and I hear a strange sound through the intake and get a flame shoot out of the carb followed by it stalling. 94 Chevy s10 is backfiring and has low power. Over 100K on engine. Nov 18, 2009 · 1988, S-10 , Stock 2. Condition/Concern: The customer concern may be a backfire or pop through the intake during a hard acceleration. I replaced the coil and the ECU and drove it around quite a bit. An improper fuel-air mixture is one of the primary reasons behind engine backfire through Customer: 95 chevy s10 4. Miss at #1and a small backfire in the pleneum. 4? pushrods, ls9 head gaskets, ls7 lifters. as in pilots, water in the bowles, CV slides not reacting as in sticky or split diaphram, way too small main Jun 3, 2024 · The bike runs great cold , and after about six miles or so it starts back firing through the carb and once it gets hot after about 12 miles or so it will start backfiring through the pipes at the same time. I put it back to stock for now until then. Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones) Polaris Hand warmers, Mirrors. after about 3 miles down the road it got worse. 8 ohms, checked for intake leaks. I’m just trying to tackle the biggest first in my opinion. Jun 27, 2008 · The previous backfires, may have created a vacuum leakscheck the vacuum hoses, etc. Mar 7, 2011 · Clogged PCV or Intake Manifold Leaks Needle moves slowly through a wide range of readings. When it comes to engine backfire through the intake, there are several key culprits that can ignite this explosive phenomenon. With the computer controlled EFI systems, I am not sure there is much you will be able to do. If I'm stopped and put it to the floor, it'll sometimes backfire through the intake/throttle body 1-3 times while accelerating until it reaches a higher rpm (don't know what rpm as I do not have a tachometer). Otherwise known as a CPI fuel injection pump. ? Otherwise seems to run rough cold and well after warmed. It lost a Aug 17, 2015 · Not a SBC but an Olds 330. Regular maintenance and timely repairs are crucial in preventing backfires . Over 2 more days driving it got worse. Checked all plugins and cables. Apr 1, 2016 · What causes a 95 s10 2. I have not experienced the backfire popping through the intake so I may have gotten that issue resolved. 6L Engine (VIN2 - RPO LLY) The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Either you are lean, or your are firing out of time via bad wires, wire routing, or mechanical timing failure. It is low on power but not extremely low, it makes it up a ridiculously steep hill in Jul 28, 2009 · As the title states once it starts up it immediatly begins to run very rough and backfire through the intake. If you have a vacuum leak at the throttle body to manifold, which is common, or anywhere else, that may be causing lean pops too. With carbed machines, that can be because of a cracked carb bootwhich is even possible with 08-09 injected engines, low fuel levels in the bowls from weak supply, partly blocked or worse slow circuts. Posted 22 Feb 2019 04:32 Nov 8, 2021 · Backfiring through the throttle body is often caused by a timing problem. 5 ,5-speed, Pusher electric fan ,Cold Air Intake /K&N Filter ,Accel high output coil, 12mm plug wires, plat plugs, highflow cat, 2. 3 tbi misfire under light load and occasional backfire through the intake. I come back out and start to accelerate and i heard it backfire through the intake once. 3L rolls, backfires, but won't start Jump to Latest 19K views 9 replies 5 participants last post by Extremes10 Aug 21, 2012 Aug 9, 2016 · Sputtering Backfire - Chevy S10 With A Blazer 4. Timing is fine to. Aug 11, 2018 · Okie is correct, backfire through intake is a "Lean" pop. If fuel pressure holds, then your coil may be weak in the secondary. 3K views 3 replies 2 participants last post by baggedNstuffed Apr 19, 2016 Dec 22, 2022 · Hey guys, so in the never ending saga of my s10 I decided to try this 2. Unburned fuel exiting a cylinder will ignite in the exhaust manifold. Also check idle air/fuel ratio. Backfiring is most commonly caused by ignition related issues. I just installed a new engine. Before I had to replace the distributor and cpi spider. 0 & SOHC 4. The flame front can then travel up the intake and cause a backfire. Oct 2, 2011 · Take your pick. this also happens if i'm in too high of a gear, but i don't let that happen. Timing is set and checked (10 degrees before TDC), new plugs, cap, rotor. The fuel pump/ lack of fuel is known for making the vehicle backfire through the intake. Cooling sys filter & waterless coolant. Oct 20, 2011 · A leaking fuel pressure regulator can cause backfiring. I repaired the intake hat re-sealing it with silicon. The backfire sounds like a pop and its very intermitten. Bottom end is 58 panhead topped with 66 shovelhead. It has a 4. 200,000 going strong Had her since new. Mar 13, 2013 · A backfire through the intake happens when the spark occurs when the intake valve is open on that cylinder. In reference to the plenum, I do have a little more oil than just a misting inside the intake so the plenum may be leaking again :VHOT: . Jan 31, 2018 · Well you sure shouldn't be required to pay for a 'tune' IMO on an in warranty H-D. 365 hp. It does not backfire through the tailpipes. I have replaced EGR valve and gasket, I have run Top engine cleaner through it to clean carbon, new plugs new wires, New Throttle Position sensor. Check the PCM scanner PIDs to see if both the Cam and Crank sensors are seeing a value. replaced both upstream o2 sensors ( this killed the backfire issue ) Dec 28, 2019 · Has to be a backfire through the intake. Aug 17, 2015 · Not a SBC but an Olds 330. Causes of Backfiring Through Intake System. I put a BTR stage II twin turbo cam, 7. I recently installed a K&N CAI on my 94 T/A. The intake valve is a component of the intake manifold. Aug 26, 2015 · Engine / Drivetrain Talk - 5. Check your fuel pressure 1st. I am getting an occasional backfire through the carb on acceleration. 3 5speed 4x4. Jul 31, 2005 · The car seems to backfire through the intake and it doesn't start I put in new fuel filter and accumulator new spark plugs, disttributor rotor, new plugs and new wires. At first I thought I blew a headgasket being it's the origional at 137K it's time may soon be up. . Dec 29, 2007 · Replace the fuel regulator in the throttle body, ive had 10 TBI S-10's ( 8 -4. Since you've already basically ruled out #1, I'd check the fuel pressure. Can't ride on the highway at all as it gets worse when at highway speeds. Plastic tube blows apart because it can't take the pressure. If you have a 4. Is it safe to assume that you cleared the codes after the repair? The best way I know to find an intake leak is to spray (unlit) propane around the intake with the engine idling. The throttle blade is ok. Idles ok but with a slight shudder here and there, but runs. Clicking this will make more experts see the question and we Nov 27, 2009 · The LPG system starts in petrol and then switch to LPG. 3L/262 - I am getting a backfire (afterfire) from my exhaust when shifting from 1st to 2nd and 3rd after engine is warmed up. Aug 25, 2011 · Leaky intake manifolds aren't uncommon with any make/model/year. Just over idle to about 1/4 throttle it backfires through the intake. It backfires through the intake, especially when I step on it up hills. The more you get on the throttle, the worse it is. If I slap the the throttle it will backfire through the intake and then pick up RPM's. 3 vortec backfire through the intake ? 2 Answers I just replaced the distributor and cpi spider. But if i really get on it then it just cracks and pops and backfires through the intake. Apr 26, 2018 · An intake manifold gasket that isn't seated correctly and pulling air in, can cause a backfire. 0 atf cooler, DP tuner with five stages :happydance: Eng Temp gauge, EGT guage and Trans temp gauge. Feb 21, 2019 · 2007 - 2014 Expedition & Navigator - Small backfires through the intake and a misfire at #1. Want Answer 1. Mar 14, 2011 · Test your MAP (Manifold Absolute Pressure) sensor sitting on top of your upper intake plenum with a Voltmeter (aka multimeter)! Its highly unlikely that its your fuel injectors, aslong as you use fuel injector cleaner every 3000 miles or every other 3k and have had throttle induction service/fuel services done "somewhat regularly" or have done them RIGHT youself, OEM fuel injectors very rarely Nov 8, 2014 · What makes my 93s-10 4. only two ways the 5. Will do this at any RPM so long as the throttle position is not changed. Lean condition means the engine isn't getting the amount of fuel it needs to operate correctly. 9L. after its been running for about 3 min then when you get it past about 1/8 throttle it looses about 50 % of its power and sputters no matter how much farther you push the pedal down it usually wont pull out of Jun 28, 2009 · Backfire through intake on startup. 3 V6 Engine 10 Answers Hi guys, I have a 1994 Chevy S10 that has a 2002 Blazer 4. 2009 Vulcan 900 classic LT, 28000 miles. When starting from stop to highway speeds the engine backfires through the intake and then its fine when driving steady speed. (Its not exhaust) I have replaced the plugs, cops, both cam sensors, compression test around 180 Jan 6, 2019 · The trouble I'm having is when it's under acceleration, I'd say about 1/2+ throttle, more so under WOT. I used nitrous kits as example of how a backfire occurs in an intake manifold. For inline four- or six-cylinder engines, the intake manifold is installed on the side. 4 2wd supercab with 138k on it has been a great truck absolutely no problems, til last week. Every since the truck seems to be running extreemly rich,smells real bad and if i accelerate too hard it pops and back fires. If your engine uses variable valve timing, a failed camshaft actuator can cause backfiring. Improper Fuel-Air Mixture. Jul 15, 2007 · It feels like turning the key on, off, on, off while accelerating, occasionally pops through intake but not always, and clears up and runs good after 10 or 20 seconds. i have changed fuel pump and fuel filter, cleaned out fuel tank,removed injectors and soaked them in injector Jun 9, 2004 · hi people! i have a 91 s-10 4. I drove to the store and it was running fine. 3 PS, auto, 6x6, 4. I have a FG50 with a Nissan TB45 propane engine that periodically backfires through the intake blowing the air cleaner cap off. Oct 26, 2023 · Engines backfiring through the intake are a puzzling and potentially damaging issue that can leave any vehicle owner concerned. Pontiac GTA mesh wheels (deep offset) 3:42 rear, . This is what launches the blower on a fuel dragster. Several causes include the following: It backfires through the intake, then it revs real high on it's own, then it goes back ot normal. Getting more impatient and loosing interest in it. Reason why you have no CEL or misaligned timing of the truck. Would smooth out some with acceleration. It fires right up and after it starts it idles well with a small shake. 3 teeth you will bend valves. I had a pita of a time with my S-10, stumbling and backfiring. new rotor and cap, plugs and wires ( no luck ) 4. Check engine light has been on and off But the last time I broke down i disconected the battery and there were no codes when i took it down to get checked. S-10 Forum. 65. Nov 20, 2015 · Re: Backfire through intake, no start issue. Did this backfire problem just start or has it been ongoing ? One thing I would check first is for intake seal leaks. Could be other issue(s) though. Jan 20, 2010 · 1973 FX frame chopped in the rear with rigid welded in place. Low fuel pressure, plugged fuel passages, weak injectors, screwed-up computer tune, etc. It cranked and backfired out the intake with some serious force. Apr 20, 2014 · My problem is usually when it sits for a little while, maybe 20mins-10hrs idk. 3 models would hesitate pretty bad and some times backfire. Check for spark at each wire. From about 1000 to 2000 rpm truck cuts out and almost dies then backfires through intake. jmmbuwp nabkyu zhxub ywojc vmyaai iyyord yoag vce uuqi uexdx