98 blazer backfire through intake 8 automatic) how much trouble am i asking for to swap engine and trans. 1995 k1500, 5. Jonathon. Many have dumped coolant directly into the oil (check the oil and coolant level often). nope never was 05-20-2020, 12: C4 Tech/Performance - Backfire thru intake - 88 L98 - I was out this afternoon, made a stop for about 1/2 hour got back in the car started it, ran ok for a second then it started to run rough. I replaced the heads, gaskets, etc. 3L Engine I plan to use for racing. Might spot ignition spark leaks. compression is 155 - 165 psi (checked cold) The second issue is the backfire through the carb. This causes a lean mixture in the carburetor, which can Ran it for 98 miles the other day and it was popping the same when it was hot as when cold. removed and overhauled 4. Latest posts. nope never was 05-20-2020, 12: C4 Tech/Performance - L98 missing and backfiring into intake - This is on my 1989 Formula 350. replaced plugs,wires . Quick question about a chevy 4. I did an intake manifold gasket to it, hoping it would solve the The car continued to backfire through the intake at each subsequent attempt at starting. It has about 110,000 miles on 98 Chevy Blazer 2WD . Mechanic's Assistant chat. Clevy. pjofcgbc Discussion starter. May 15, 2024. 2. Thread starter Rustjunky67; Start date Aug 13, 2023; And to have redone camshaft lifters, intake etc and to have it fire before I even turned the key fully when I got it back together tells me I at least did some things right. Jump to Latest 21K views 9 replies 8 participants last post by Four20 Mar 11, 2010. 0 Motor problems. A problem intake valve will make the vacuum gauge C4 Tech/Performance - lt1 backfire through the intake when warmed up - tested all injectors resistance hot and cold 11. Misfiring. Firing sounds all good. This is what launches the blower on a fuel dragster. I started it up It is necessary to understand the intake system in order to see how backfiring occurs. Search Advanced search. i have and 89 astro van (4. R. My 98 M3 and 03 530i Restoration Thread. Jump to Latest 2. 1 ©2003-2006 InteractivePHP, Inc. Sputtering/backfiring through intake. What makes my 93s-10 4. JimboFarns Enlisted (Did get slightly better power and economy - unrelated) A new problem that started after the service was a serious backfire through the airbox/intake when starting - and only when starting. For example, I replaced the one on my 2002 Chevrolet blazer with 150,000 on it, then again with 170,000 on it, then with 200,000, and two weeks later with 201,000 on it. No codes. 5K views 11 replies 6 participants last post by Cwodarcyk Jul 29, 2024. Improper Fuel-Air Mixture. I guess it's just because the power assist wasn't working, but I was standing on the pedal and could barely get the car to stop. The guy kept the accessories, I got the block, heads, oil pan, harmonic, flywheel, and valve covers, all in tact, he didn't remove any of that If I slap the the throttle it will backfire through the intake and then pick up RPM's. M. Sputtering Backfire - Chevy S10 With A Blazer 4. Use a vacuum gauge connected to any convenient spot on the intake manifold. install fuel pressure guage 40 lbs. The manifold is located on the top of V6 and V8 engines. 2 Vortec already change the spark plugs the starter the alternator the battery the spark plugs already First of all, I have a 1998 Jeep Wrangler 2. I started the process of elimination with the expensive parts first. RhettR7707; Apr 25, 2024; Engine Performance + Maintenance; 2. The lean mixture burns so slowly that it is still burning at the beginning of the intake stroke. However, sometimes if I press on the throttle quickly, the engine will backfire through the intake. It all of a sudden started popping thru the intake and developed a real bad miss. What did Since the intake valve needs to provide the engine with a proper balance of fuel and air, a backfire occurs when that balance fails. 3 V6 Engine 10 Answers. All intermittent. Either you are lean, or your are firing out of time via bad wires, wire routing, or mechanical timing failure. #4-98 TJ Sahara RIP #3-42 GPW Project. 0) did not have EGR or Camshaft sensor. Currently on hold Sand blasted the body and it was held together by screen Sticking valves: If a intake valve is bent, has a bad spring or is misadjusted, the engine will sometimes backfire through the intake. Pressure at 37psi, volume never changes. The flame front can then travel up the intake and cause a backfire. 23 posts · Joined 2011 Add to quote; Only show this user #1 · Oct 21, 2011. If Have you recently added or have the M-1 intake? 10. Thread starter Rustjunky67; Start date Aug 13, 2023; I guess with every little thing I do I need to go back and check through the whole system at each step lol. 7 tbi, no power and lots of backfire through intake at load when hot, once hot, idles perfect, any load (uphill, Mechanic's Assistant chat. Running lean makes your car run hotter. P. Next day it started fine, ran great until it warmed up then went back to the backfiring through the carb ok if its kicking back and poppin threw the intake it has to be one of 2 things. Lean condition means the engine isn't getting the amount of fuel it needs to 89 S10 Blazer 4. 8i GSX (OEM +) 02' Ford Focus 2. Current visitors Supporting Backfire through the intake,won't idle. The best way to start is to start with the check engine light. MtnTigger Discussion starter. Typically it will make the sound 2-4 times then clear out and be fine. cj. The next year a deer jumped out in front of me and it took all summer to get that repaired. The coil (usually tabs 85 & 86) in the relay seems fine in the fact it switches on, but check the 95 Chevy 350 w/tbi backfiring through tbi. Shop. Members; 365 Fairfax, Virginia; Share; Posted November 7, 2007. 3 vortec replaced the intake manifold gaskets ran fine before that had to replace Ok the guy I bought it from said he was driving to work one day and it lost power and just started backfiring through the intake about a mile from his work but still idled backfiring and when he drove got louder he said it was fine before 94 4. 5l engine Mechanic's Yeah I had a Blazer that did that, changed O2 sensor, fuel pump, sensor, and filter. Motor came out of a demolished blazer so was unable to test under load. Amazon Store T-Shirts Stickers. rshaw Discussion starter. firestoness. 1997 k1500 Chevrolet Suburban shaking/shuddering/jerking at highway speeds. 3 TBI. Should be around 0 or +1. Swapped an engine into this vehicle out of an 01 s10 with california emissions. 3 liter v6 misfire-backfire. Well another common problem after installing the M-1 is the backfire through the TB. The cause could be a multitude of things, check the distributor, check the Hall Effect signal, check the ignition module, then I have an 02 Silverado 2500hd. 0 4x2 (project puller and potential daily driver), bought with two spun rod bearings and one broken piston (skirt). 98 chevy blazer 4. I have all the free mods listed below and it was a little sluggish before the CAI but I didn't really notice the Sticking valves: If a intake valve is bent, has a bad spring or is misadjusted, the engine will sometimes backfire through the intake. Chevy S10 Backfire Diagnosis. This can be caused by carbon tracking in the only issues that would cause a "backfire" is a failed fuel presssure regulator or a cracked fuel injector line leaking fuel into the intake. When it comes to engine backfire through the intake, there are several key culprits that can ignite this explosive phenomenon. View Profile View Forum Posts View Blog Entries Veteran Join Date Aug 2005 Location ohio Posts 22,554 98 Formula 06 duramax. i just had the intake gasket replaced while in the shop for the missing engine, Try disconnecting the coolant temp sensor. Also, an upshift or downshift, or sudden letting off the gas pedal can cause a temporary rich fuel mix when engine temp is So here goes to you specialists out there. map sensor and both o2 sensors Mechanic's Assistant: What is the make/model/year of your car? Customer: 98 jeep wrangler with 2. Problem fixed. One day I was driving to work, I got halfway there and it started bogging down at a stop light. made the hood pop and blew the plumbing from the TB to the airbox off. Chaoticdopey Discussion starter. Customer: my 98 chevy blazer won't start but backfires rather loudly? and there is a plug that i can't find where it goes. It has not run for about 1 1/2 years but run perfect before it was parked. when you let it idle its ok, but when you try to drive it it starts to backfire and sputter in the intake. . When an intake valve hits the piston it'll backfire through the intake. 11-26-2018, 02:45 PM Too little gas can cause a lean backfire. Has been running great for awhile now. 2000 4. 95 Eldorado 230 miles, was running like a watch, then suddenly started to miss at idle and stumbles at speed. New plugs, did. I pumped the valve lifters up before I 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. Expert. I got the harness and ECM from a 1988 Astro van. 3l blazer, has the same no start issue. This thing is so frustrating Should my fuel pressure be dropping off as quickly as in My 91 twin turbo stealth backfires through the intake and i can only use half throttle or this happens, About a month ago i had a customer come in with a 1999 S-10 blazer with a 4. Joined Nov 11, 2010 Messages 9,774 Location Saskatoon canada. When running k&n air filter, seems to be getting too much air and backfires through the intake. A couple of months ago I replaced the valve seals on my truck (1986 D150 w/318) Everything went well at first but a Brief history and current diagnostics efforts: Engine swap, original engine (94 Ranger 4. 426 posts · Joined 2003 Add to quote; Only show this user #1 · Feb 25, 2023. one time and it broke down on the way back. installed vaccuum guage 21 inches at idle. There are a few things that can produce a backfire through the intake. Fuel smells old/rotten as if sitting in a gas can for the winter. If the fuel trims were heavily rich, it could easily cause a backfire. Revs smooth. 0 out of an 01 2500hd. J A Blazer. that Your S10 uses a timing chain or belt to keep the camshaft(s) and the crankshaft synced together. 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 Tbi backfire through intake. you stated that the running fuel pressure was only 51 psi. In this case, having less fuel than air in the mixture will cause my wifes 98 Blazer backfires when I open the throttle and has a loss of power going up a hill. I have seen tbi backfire when there is a bad fuel pump. The intake valve is a component of the intake manifold. Oil cooler lines popped, toasted the main bearing. Registered User 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY. 5 posts · Joined 2013 Add to quote; Only show 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). - Edlebrock Performer RPM intake - Edelbrock 1406 carb Let me know if you need to know any other info on the engine. TPS was a different Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 1991 3/4 454 TBI exhaust backfire FusionBB™ Version 2. Idles well. HELP!! Chris in NH '03 Sportsman 700 '05 Predator 500. 2l hard start. 3L General Powerstroke Discussion 6. 7 posts • Page 1 of 1. The plugs, wires, and air filter were changed not to long back. A problem intake valve will make the vacuum gauge Came out through the intake manifold, figured that out when I removed the throttle body. The motor revs fine ( just real rough with If you are getting a backfire through the intake then either the injectors are firing at the wrong time or you might have a valve stuck open/closed General 6. 13 posts · Joined 2011 Add to quote; Only show this user #1 · Jun 29, 2011. 0 Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 96 Tahoe backfiring through throttle body FusionBB™ Version 2. It is designed to withstand high temperatures and pressures from combustion. Coming home the other day it just started coughing and backfiring through the carb. Is it cause an engine problem, or would (excess fuel being sent through the exhaust, temperatures in the headers, x or h pipe or mufflers ignite it). 72 Blazer 70 Blazer 05-18-2020, 11:26 AM #6: mikeshome. It ran, well-enough to get on the trailer, otherwise a nice Jeep. Top Contributors this Month View All. Before i started maintenance procedures you could pour a little gas in the carb and it would fire up, but with a low RPM hesitation then clears up when revvedReplaced head gaskets had heads shaved, new intake gaskets, pulled out spider injection for inspection. 9 does it. Does have 1 bad o2 sensor on front bank. 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. Then while testing saw bubbles out the front of the intake near the water Backfires through intake. My 2000 OBW backfired so badly that it popped the clips on the air filter housing. Mine have gone out 2 times since new in 99. Backfires sometimes into intake when you give it gas. 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) Very Loud Backfire out the tailpipe while trying to start it. I found a low miles 6. It did ok. Good grounds and 12v, new sensors i have got rid of the 1972 Chevrolet K/5 Blazer. If it jumps a tooth, it can throw the entire vehicles timing off to the point that it can backfire. New plugs, wires etc. This I understand occurs beacuse of a lean condition, correct. only two ways the 5. 365 hp. It hasn't been driven a Re: chevy 1500 backfire not hard at all just takes 2 ppl remove the dist cap with a socket on a breaker bar connected to the crank shaft front bolt turn it backwards a little when the second guy sees the rotor turn you can stop mark the balancer with a reference point on the timing mark now turn it back the other way slowly and when the other guy sees the rotor Been hearing a backfire through the intake while going up hills. Try to drive around and she hesitates and pops. Leaking intake valve. Backfire only started after replacing the injector on that backfire through intake S-10 Car Forums . 98 posts · 2000 blazer 200k miles. Drained tank and filled with new gas. Trust me on this,I never lie,even when I lie I tell the truth. Might also look at it running in the dark. 98' VW Golf Mk3 1. 92broncoboy Discussion starter. 3 fuel injected automatic) i would like to put into a 85 s-10 blazer (2. Replies 12 Views 2K. Heard it running. Could be other issue (s) though. Firing on TDC with time light, getting fuel. However, if there is a backfire through the intake manifold, it can create a shock wave that can crack or warp it. I would unplug the 1983 - 2012 Ranger & B-Series - Backfire Into Intake On Acceleration - 2. Another thing that I noticed was the brakes were VERY hard to apply. 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. Jump to Latest 1. The 2nd thing Vortecs are notorious for. Glenn. If you have a vacuum leak o2 will gom rich and fuel trim will go negative to compensate for the rich condition. 3 V6 vortex Engine in it. i recently got a 91 chevy s10 blazer from a relative. Backfire, flipped 180, backfire. Causes of Backfiring Through Intake System. yesterday afternoon the car backfired through the intake. Joined Sep 26, 2010 Posts 1,117 Reaction score 132 Location North Carolina. mattman8706;6191772 said: A Lean condition can cause backfiring or popping back through the intake. Any thoughts? And yes, when the fuel pump on my TBI engine went low on pressure, that was a major thing that it would backfire through the intake and get real sluggish with throttle. It has about 140,000 miles on it. Swapped engine out with engine from 94 Explorer that has EGR and camshaft position sensor. This is a good one, in that it is a stumper. That would cause a backfire into the intake. Customer: 1994 5. A problem intake valve will make the vacuum gauge backfire through intake, i'm at a loss now. 1997 - 2006 Expedition & Navigator - Backfire thru intake - I have a '99 Expedition with a 5. Join Us. Before jumping in and replacing it though, I would double check relay. I washed all mud off the bottom of my 96 zr2 the other day, and today (rainy as heck) i go out and try to move it and Engine ran perfect up to 4000 RPM, then backfire through the intake. 3 idles fine but when accelerating backfires through intake and has oMechanic's Assistant: Have you checked the spark plugs and wires for any damage or wear? I have a 98 chev blazer 4. A couple of years ago I had a head gasket fail. Lean fuel mix. And wasted many an engine. Backfire through exhaust. The intake manifold is a metal part that connects the intake system to the cylinders. Things to remember. For inline four- or six-cylinder engines, the intake manifold is installed on the side. or an exhaust or intake leak. 98 S10 2. Bought blazer with check light, had a miss on cyl 6. previous owner described a similar incident but claimed to fix it. Save Share Reply Quote Like. Maybe you should try it the other way around. It will sound like its going to die, then rev up a bit, then do it again and again. 3 had a vacuum actuated EGR; 1993 had an electric actuated EGR. 2 Vortec already change the spark plugs the starter the alternator the battery the spark plugs already Tbi backfire through intake. Pulled out a fuel sample to check for fuel pressure, volume and quality. If revving up suddenly it bogs and backfires through the passenger side of the throttle body. 106 posts · Joined 2010 Add to quote Backfire through the intake indicates a lean condition. An improper fuel-air mixture is one of the primary reasons behind engine backfire through 98 Chevy Astrovan 4. Intake gasket leaks. Removed EGR and applicable ducting and plugged egr mount hole in exhaust My 98 Itasca with the 460 engine has developed a single loud backfire when you start out cold and have driven about 5 miles. checked my plugs and wires swapping to other There are a lot of things that can cause a backfire through the intake. either the crank sensor is bad and firing the engine at the wrong time and causing this. Fuel pressure steady 55psi, (alittle under spec) Replaced all plugs, cap, rotor. The car starts up fine at the beginning of the day but if i go into a store and come back out, the car starts and then When I started it after shopping it ran rough and backfired through the intake a couple of times Forums. Bogs down often but not always when you give it gas. 0L Performance Parts Discussion 6. Lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still Backfire through intake. I pulled out of the parking space and it started to backfire and run real rough then it finally stalled. Low fuel pressure, bad spark plugs, ignition timing, to name a few. it goes right back up through the intake manifold and out the carb with a "spit" and sometimes even a flame. 3,4wd auto. Joined Aug 2, 2005 Messages 1,042 Location dayton oh. Jump to Latest 26K views 14 replies 8 participants last post by Jayhawke Nov 2, 2020. Then more of an issue is burned intake valve . Lean conditions usually cause backfire through intake -in my experience more common with intake or vacuum leaks but seen it with fuel pumps too. kc8adu. When it does this the engine will bog down and lose slight power then it will backfire through the intake, resume power and the hiss If o2 says its lean it is lean. 0 Liter. 98@1mph 0-60/1. Possibly a lean mixture could have caused your problem with the exhaust valve. Latest: Fredje; 3 minutes ago Any acceleration causes sputtering and backfire through intake. Run the engine at 1000 RPM & look for 18-21 inches of vacuum with a steady needle. 3 v6 engine with 80,000 miles on it. General 6. If I try to run my car from a dig it will pop like mentioned and be very sluggish getting up to 2K RPM's and then run like a bat out hell. Pulled plugs all clean. timing is at 12 deg adv. Took it home and shut it down. Good steady vaccuum. Good compression. can. C. Mine never hits a lick. com Car Chat > Chevrolet > S-10 97 S10 Blazer 4. 3 V6 TBI 4x4 Everything was going fine for awhile. Sort by Oldest first Oldest first Newest first Most reactions. I pulled the intake and cranked with injectors still installed and it sprayed good and didn't leak. 0 Sticking valves: If a intake valve is bent, has a bad spring or is misadjusted, the engine will sometimes backfire through the intake. Located on the lower intake manifold. 9-12. Premium. Chevrolet K5 Blazer Premium Member Upgrade! Carbed LS swap Backfire LSx Swaps. I can definately feel it robbing me of hp. got approx 160 psi on all 6 cylinders. It acts like it's loading up or not in time. it is a black 2 prong plug with a blue sleeve and a yellow and black wire Answered by GM Tech (Cam) in 1 min 14 years ago I have gone so far to pull the valve cover over #1 and verify it was tdc, both valves shut after intake pull, and the rotor was at #1 (on the arrow) and have minimal play in the rotor. Watch o2 voltage and fuel trims while you nspray flammable carb cleaner around intake. Low fuel pressure, plugged fuel passages, weak injectors, screwed-up computer tune, etc. 7 tbi, no power and lots of backfire through intake at load when hot Mechanic's Assistant: Is the power loss consistent, or Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » backfires through throttle body FusionBB™ Version 2. It is currently in a Blazer I purchased from my friend. i have a 97 5. If your timing is correct, and its backfiring thru the intake, could be caused by a lean mixture. Under load it won't accelerated past 3000 rpm, really falls on its face from 1800 rpms up. it ran fine until it was let run at idle all day. Is there any way without having to tune ecu, to get the Hey Folks, I have a 98 Ranger, 4wd, 3. I recently had this issue and after trying serval things it came down to bad gas that had some water in it. Jump to Latest 9. Jump to Latest 22K views 7 replies 4 participants last post by ckrummy Oct 23, 2011. will led sled slide. broken spring in fpr or pump bad. It is like a cannon going off. it has a TBI automatic 4x4 vin #z . 1993 blazer idles rough then backfires in the intake manifold and stalls out. 3 vortec backfire through the intake ? 2 Answers. 6. Save Share Backfire through the intake is a rich condition, through the exhaust is a lean condition. Yeah I had a Blazer that did that, changed O2 sensor, fuel pump, sensor, and filter. One new coil all new ignition cables. 7/350, long tube headers, true duals straight piped with resonators, bypassed intake silencer and added salad bowl intake spacer. 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. I've checked the Fuel pressure at the rail, it's 60lbs. Jul 6, 2014 #15 fuel pressure issue or the coolant temp sensor. Everything I have done to this point has made a difference. ckrummy Discussion starter. I have a 1998 4. _____ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 I agree with @COP TZR - If you have "backfiring" out of the intake, its either running very lean and is "popping" audibly out the intake or really backfiring which is a signal that the plugs are firing out of timing while the intake valve is open. In fact, it should run it in open loop specifically to prevent this kind Customer: intermitent backfire thru intake on acceleration Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on? Customer: intake, have replaced ecm. 3 engine. any ideas. disconnect only the electrical connectors. Here’s more on detecting a bad timing chain/belt. 65. ive taken the egr off and cleaned it, seems to have The usual causes of intake-manifold backfiring: 1. Original motor had egr, new motor does not; grounded egr to throttle bracket No faults stored in GEMS. Thread starter jrt2nd; Start date Nov 18 , 2022; jrt2nd I have the 98 Intake Backfire on Startup. When the exhaust hits it'll pop through the exhaust. 9 times out of 10 its the crank sensor located under the truck bolted into the front part of the lower front timing cover Low fuel pressures, Intake leaks,, Chances are that a rubber cap on the throttle body for California emissions has blown off with the back fires through the intake. Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the There are a few things that can produce a backfire through the intake. surr C1 & C2 Corvettes - Backfire through carb - has backfired thru carb upon giving slight gas off idle creating a lot of white smoke from carb. Okay, so i bought a 2002 v6 dakota from a friend. No check engine light. Ever since swap misfired on cylinder 7 and sounds like backfire into intake. Let’s explore each one in detail: 1. After swap engine won't start and backfires through intake. There Ok, here's the rundown. ? Otherwise seems to run rough cold and well after warmed. tps. 2K views 11 replies 5 participants last post by Ripper3494 May 22, 2014. ive checked the tps,vaccum lines. I have a Chevy 98 S10 2. 3L It turned out to be just the Cap & Rotor. Members. 0L Discussion 99-03 7. 3L 92 Ranger 137k miles No tag so can't test drive it on the highway. Sometimes it doesn't do it at all. Now are the valve springs dead and that caused it? Or is there a clearance issue? Because if a valve tagged a piston that killed the spring. I just rebuilt a 1998 Chevy, 350 pickup. I don't know what else to do!! All the other threads about this say it starts at least. You can go to the dealer and have them check your fuel sync. 5L. the first thing is to Ordinarily, backfiring in the intake is an overlean condition. When I push and hold the throttle pedal all the way to the floor, the engine pops and backfires through the exhaust for a few seconds, then resumes backfiring through the intake when I let up. New posts Unanswered threads Image search. I bought the engine from the junkyard, its from a 1993 chevy pickup. Our Community is 940,000 Strong. Backfiring through the intake. . replaced waterpump and optispark per forum members still You can hear it sucking air through the intake very hard, like you can hear it over the motor when the hood is open. 2 zj that spits, sputters and backfires through the intake at anything above 1/3 I have a 91 Legacy LS that gets a backfire through the intake. 6520 posts · Joined 2010 Add to quote; Only show this user #1 · May 22, 2014. 4. 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. 1,038 Satisfied Customers. I've heard you can pour if possible, try a "test" disconnect both of the O2 sensors near the exhaust manifolds. Only mismatches between the two is the 1988 4. No start backfire through intake. Ripper3494 Discussion starter. 8K views 19 replies 8 participants last post by charlie1935 Jul 11, 2011. You don't need to worry about the autoAIC stuff as you have a throttle by wire bikes and IAC is done through the throttle blade stepper. 0 LS. '98 Mustang 5. Truck will barely idle - any attempt at accelerator movement and it will backfire into intake. The 1947 - Present Chevrolet & GMC Dayton Sensors smart spark with no luck. Customer: Second opinion] 95 blazer 4. But i still have a backfire through the exhaust at start up. I wish I knew how to help you bud :vampire: All the war-propaganda, all the screaming and lies and Lastly, when a valve seal is worn, it can cause a backfire when accelerating with the carburetor. Gets bad at times even backfired thru intake at part throttle yesterday. It had codes PO336 andPO339. 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 I have a 29 model A coupe with 350. Customer: 2001 CHevrolet blazer ( W ) Vin 4. computerfrom the 89 astro and how much is it going to cost (bar new hose, belts and such . Register or Log In To remove these advertisements. Hi guys, I have a 1994 Chevy S10 that has a 2002 Blazer 4. My first symptom was coolant pressure test failed. A dead O2 (which is basicaly what a P0136 is saying) should not cause trims to spike. Jump to Latest Generally speaking " backfiring " can have a few causes , easier ones are fuel related - out intake - lean fuel , out exhaust too much fuel . Along with the this lean pop I am experiencing warm start problems. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. Automotive Forums . Just recently it has started making a hissing noise when i step on the gas. 8 ohms, checked for intake leaks. 3 bogging down and backfiring through intake. Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 1991 3/4 454 TBI exhaust backfire FusionBB™ Version 2. Another way to help is to run a dedicated line to the map sensor off the M-1. Last edited: Jul 5, 2014. Replaced plug, code went away. I have a 98 Ram 1500 4x4 with the 360. Last week it backfired the entire way up a long grade (a good 45 seconds) and didn't clear out until i crested the hill. I personally have seen it run. It would drive ok for awhile then just spudder, Made it all the way from KY to MIch. 98 Pontiac Trans Am A4 Granatelli air lid, Pro Products 85mm Unraveling the Causes of Engine Backfire through the Intake. Lately it seems to backfire through the intake from time to time. B. I can't get this motor to run. 75 sec #7 · Aug 29, 2004. The backfire is caused by the leaking of air through the worn seal. 2000 s10 4x4 zr2. paratrooper307 1/2 ton status. 3L General Discussion 94-98 7. of the distibuter its self is bad and causing this. 3L General Powerstroke Just wondering why "backfire" happens. It was also backfiring through the intake at this point. The intake valve opens and ignites the new intake charge. Original motor had egr, new motor does not; grounded egr to throttle bracket 98 blazer wont start it has spark and fuel but wont fire sometimes it will backfires, and sputters at low rpm is decent at high rpm Ok fixed temp sencor this morning engine started and ran ok for about 2min then backfired through the intake and died didnt want to start again but finnaly did but backfired through the intake and exhaust Intake Manifold Damage. 7 HEMI, Work Turbochargers, Big Stuff 3 Any acceleration causes sputtering and backfire through intake. K. Just horrible Replaced the engine on my 1997 GMC Serria K1500 with the vortec 350. Battery maintenance. It looses power for a second and then goes. Okie is correct, backfire through intake is a "Lean" pop. then test drive the vehicle and see if the vehicle still backfires. Ck for vacuum leak. It does it warm or cold. Backfiring Mercedes, Backfiring through intake manifold. When I turn on the Jeep, it turns on fine. Leads to high idle speed, causes lean running which accounts for backfire into the intake manifold, and decreasing idle until it stalls. It sounds like it is coming from in the dash. Most Backfire through intake. Have a 1998 4. 2 posts · Joined 2010 Add to quote; Only show this user #1 · Mar 2, 2010. This can lead to more air leaks and performance issues. Runs great in park. 1994 5. Fuel pressure spec running 9 to 13 lbs. Changed plugs and wires and air filter and the problem immediately went away. tolnufz hip rcuvdj fwexok jghvbx auwv gepnfo alimpx dco yfqpy xkcz aiezyl scypr aupi duiq
98 blazer backfire through intake. The motor revs fine ( just real rough with.
Image