22re backfire through intake I drove to the store and it was running fine. Backfire through the carb can be ignition related but a vacuum leak or valve problem could cause Jan 14, 2016 · Will backfire out of intake. It was caused by the valve lash. I pulled the air cleaner and seen it occur. I've played with the timing and fuel ratios, checked compression, tried disconnecting the vacuum advance, everything I can think of. Did this backfire problem just start or has it been ongoing ? One thing I would check first is for intake seal leaks. 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). ) Apr 25, 2011 · i have a 1981 yota with the 22R has a weber carb 32/36 and it runs good tell about 1700 RPM,s and thin starts backfiring up the carb. Trying to figure out Dec 23, 2021 · Backfires through the intake. Oct 24, 2005 · The intake opened, cylinder fired, and the exhaust went directly back through the intake valve. {ie - check valve clearance - hot - possible weak valve springs} Jun 25, 2019 · Backfiring thru intake and stalling when I hit the throttle have anybody had this issue with they 5. 350 chevy firing order is 18436572. But if i really get on it then it just cracks and pops and backfires through the intake. 0L i would keep the same engine. 3K views 1 reply 2 participants last post by roadwarrior80 Dec 2, 2011 Apr 2, 2017 · This is an example of a backfire into the intake manifold. Kinda like Kleenex. It does not backfire through the tailpipes. If I open the throttle, the engine will sputter and cough and backfire out the intake before racing back to normal. The engine is having a intermittent problems with power loss / hesitation / very low (approx 500) idle. 060,LCE stage II race cam The #2 cylinder opening in the intake plenum is right under the cold start injector. It happens as soon as the bike warms up even a little bit. after about 3 miles down the road it got worse. B. Jan 5, 2012 · Come on guys, you can start that engine with absolutely no sensors. 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. the spark is at the wrong time, or at the right time with the valve opening at the wrong time, which allows the fuel to flash back through the intake and out of the carb. Let’s explore each one in detail: 1. I put a BTR stage II twin turbo cam, 7. Why Does My Car Backfire Through The Carb? Your car may backfire through the carburetor due to a few key reasons. In this comprehensive guide, we will delve into the common causes behind an engine backfiring through the intake. Popping back through the intakes is caused by extreen leaning. 6L Engine (VIN2 - RPO LLY) The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. We have spark, fuel and starter is turning. Aug 27, 2008 · Interesting, I haven't heard of slack in timing chain cause afterfiring. It was running pretty poorly since I got it. Jul 15, 2008 · A Lean condition can cause backfiring or popping back through the intake. 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: . When it comes to engine backfire through the intake, there are several key culprits that can ignite this explosive phenomenon. Could it be a problem with the block height on the 81-84 22r being a 1/4" taller? Maybe it's because i used a 85 & up oil pump? Aug 21, 2008 · Backfiring thru the exhaust occurs in engines that have an emission system malfunction, exhaust leak or unburnt fuel in an exhaust system in which the catalytic converter has been removed. Many have dumped coolant directly into the oil (check the oil and coolant level often). 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. If I gave it more throttle or backed off completely it ran like like nothing was wrong. One would think Aug 11, 2008 · is it a 22r or a 22re? 98 Tacoma 4wd xcab Sr5 2. I went to mechanic and had them set the freshly rebuilt carb up for me. On some 22R, they are equipped with a decel valve mounted on top of the right fender, which redirects the air injection between the exhaust ports to the air cleaner and what not, it is there to lower the emission out the tail pipe. Feb 8, 2013 · With the engine cranking over all 6 poppet nozzles are spraying. And going to pull all the smog off again once I can get it to running. A volatile fuel mixture is flowing through the turbo, charge piping, throttle body and intake manifold. So, thinking maybe my timing was off causing the backfiring I popped the cam cover and aligned the crank to 0 degrees. It lost a The major symptom of a vacuum leak is very poor idle quality, stalling, Spitting back through the Intake, and a very lean condition at part throttle. 7 auto, 265/75/R16 Kelly Safari TSR's, Mossyrock's Sliders, 881's and billy's, OME dakar leafs and shocks. 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. Try unplugging the vacuum to this and see if the problem goes away. Only show Oct 26, 2025 · Engines backfiring through the intake are a puzzling and potentially damaging issue that can leave any vehicle owner concerned. 83 4wd pickup 22r some sort of lift, 5. 1 2 3. The Toyota 22R engine is a legendary powerplant known for its durability and reliability. Nov 2, 2006 · I have an '85 22R that is backfiring through the carb and it pops and splutters at anything much above half-throttle. Pull #1 spark plug, stick pencil or dowel through spark plug hole. Aug 17, 2008 · Just recently it has started making a hissing noise when i step on the gas. One common cause is an incorrect air-fuel mixture. I double checked the crank and cam gear were 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. 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 So my new-to-me carbureted 1200 Sportster with V&H pipes backfires on the intake side when I am even gently on the gas, which causes the bike to die each time it does so. 9 does it. Stop wasting time and money looking for an electrical issue. it just decided to crap out on me when i went into the store for 1 min, come back out while it was idling put it in first and bam no power, 3k rpms some power there. Dec 3, 2017 · From what I have read this is caused by a backfire and the thumping is the sound of the explosion in the intake manifold working its way out of the front resonator section. some people have swap to the tacoma 3. Joined Sep 8, 2007 · 519 Posts #21 · Dec 23, 2021. This aap is on a timed temp switch located on the intake so after the engine warms up a bit the symptom would go away as you described. It is intermittent. The manifold is located on the top of V6 and V8 engines. Regular maintenance and timely repairs are crucial in preventing backfires . 77. . Qty: Details Fitment Instructions LC Pro Air Intake Kit Nov 7, 2005 · 83 22R backfire, read the shop manual and checked everything. 8 efi missing fire and backfires through intake - I have a 1988 F250 with a 5. It's a timing issue. I noticed that it hesitated a little when i first left my house. Whatever the cause, backfiring happens as a small Feb 28, 2008 · Recently it did start to backfire occassionally, but after messing with everything, I'm sure my timing, TPS, and other things are not correctly set. 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. I have a custom intake, K&N style cone filter. There is some sort of combustion as every so often a loud pop and smoke comes out of the air intake. Condition/Concern: The customer concern may be a backfire or pop through the intake during a hard acceleration. I would definitely start with the excessive fuel delivery. Jan 11, 2021 · If the perceived backfire occurred it occurred in your exhaust system, not your intake system. I plan on getting everything reset today after work. I know this backfire is a result of a lean condition thanks to several searches here in the forum. Causes of Backfiring Through Intake System. 28 in. An improper fuel-air mixture is one of the primary reasons behind engine backfire through Apr 1, 2007 · While driving on the highway, I started to experience a backfire through the Weber 32/36 DGV carb on my 74 F motor. Throwing codes 2 and 8. It now occurs on exeleration and pings at times through the 2500-3000 rpms. Jan 2, 2010 · It is completely stock. Keep me posted, be glad to Aug 8, 2011 · 1985 4runner with a fresh 22re (less than 3000 miles on it). This is what launches the blower on a fuel dragster. It is necessary to understand the intake system in order to see how backfiring occurs. my understanding is that mostly lean combustion conditions (such as no accelerator… joe kemlage on Chevy S10 2. After a hard load, the engine has a moment of running rich or with insufficient oxygen. 5 speed. Quantity in Stock:3. We replaced everything timed it up crankshaft key at 12 o clock and camshaft dot line up with top dot on cam and with the rotor pointed at #1 spark plug. Nov 21, 2003 · Here is the new clue: If I run the engine at idle for about 10 minutes the rpms will drop slightly. For inline four- or six-cylinder engines, the intake manifold is installed on the side. After doing a few checks, I Jun 30, 2009 · AR-TTORA founder 22R bored. Your level is good so it's not the carb just being overcome by fuel. if you have a 3. When I try to start it it seriously backfires (actual fire shooting out the carb). The flame front can then travel up the intake and cause a backfire. 1991 22RE Pickup. new rotor and cap, plugs and wires ( no luck ) 4. What I have found is that the timing marks do not liine up at all, in order for the engine to have a decent idle I had to install the distributor with Oct 10, 2012 · Now one thing to keep in mind though. Jan 31, 2018 · Well you sure shouldn't be required to pay for a 'tune' IMO on an in warranty H-D. The Timing Chain wore a hole through the timing cover. Dec 4, 2007 · 1997 - 2003 F150 - Backfiring through the intake manifold - I have a 1997 F150 with about 150,000 on it. There could be several reasons why the intake system backfires. This is the most common problem when doing carb conversions where either adapter plates are used or new intake manifolds are fitted. 160,000 miles. Anyone have any suggestions? Dec 9, 2024 · Lastly, inspect for any vacuum leaks in the intake manifold and replace damaged hoses or gaskets. replaced both upstream o2 sensors ( this killed the backfire issue ) 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. Jan 25, 2002 · The diaphram in the fuel pressure regulator tore, allowing fuel to pass through the vaccum lines into the intake manifold. I was having an issue with it backfiring everytime I shifted at higher RPM's. Footage taken from Holley Carburetor Installation & Tuning DVD May 8, 2007 · quick question here: my 85 22re 4x4 has developed an exhaust leak near the engine over the 8 months I have owned it. When the throttle body closes there's high vaccum in the intake manifold, and it sucks fuel in through those vaccum lines causing an over-rich condition and a big backfire up through the throttle body. only two ways the 5. Over 2 more days driving it got worse. so i don't think that it has a cold start injector, but I'll see what it does have that I can ck. Mar 14, 2012 · When it starts bogging, it will do it in neutral and 1st 2nd and 3rd. A engine backfire will cause a explosion in this system. Totally flooded. And wasted many an engine. So over a week this got worse and worse. So im having an issue when the car is cold, it will backfire through the intake and theres a massive delay in the throttle. 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. You don't get pop, pop, pop out of the intake or exhaust without a valve being a problem. Jan 2, 2025 · Less than a 1/4 inch and the tach started bouncing iratically all over the place and the engine started missing and backfiring pretty bad. If I push the throttle open more than 1/4 of the way with load it will backfire and run very badly. These are getting harder and harder to find and some parts are worth bucks to the the die hards into the stock gas setups. May 7, 2012 · 22RE Studdering/Hesitation/Backfire HELP please! eightnine: Classic T4Rs: 2: 11-05-2017 06:47 PM: 99 SR5: Significant missing & backfire through intake: DriftPunch Dec 11, 2006 · My new-to-me 1st gen '89 4Runner (22RE) with 189K has had a problem with hesitating and general lack of power at partial throttle and/or low revs under load. 2 mm (0. " With it unplugged, it should never open up, so therefore, the hot exhaust gases wont be passing through and into the intake manifold, and if you touch the EGR port that is on the intake side, then it should be the same temperature as the intake manifold itself, maybe around 100-150 degrees or so? Sep 28, 2015 · Backfire/Studder under acceleration: T4RFool: 3rd gen T4Rs: 231: 12-09-2021 10:54 PM: 22RE Studdering/Hesitation/Backfire HELP please! eightnine: Classic T4Rs: 2: 11-05-2017 06:47 PM: 99 SR5: Significant missing & backfire through intake: DriftPunch: 3rd gen T4Rs: 2: 10-27-2017 03:22 PM: Intake Backfire to Shitty Idle: Red88TopangaCa: Classic May 26, 2006 · Hi, I have done extensive research and trouble shooting and would like some assistance. The lean mixture burns so slowly that it is still burning at the beginning of the intake stroke. I ALWAYS pull smog Jun 10, 2015 · 4. Blown fuses. #1 piston should be all the way to the top of the cylinder. Sep 25, 2016 · If I push the throttle open quickly it will stumble and backfire through the intake with no load. 8 efi. Also, I was messing with the car about 3 years ago with the stock motor and a lifter collapsed (freak thing). 0 backfire through intake Jump to Latest 21K views 13 replies 6 participants last post by RLT330 Oct 23, 2024 May 7, 2007 · It's hard to argue against the company that does intake systems, although some will. how ever there are lot of differences. Bart_3500 · Registered. Mar 1, 2007 · it was acting like it was gonna start, but backfired through intake, and now it's not really wantin to start. I pulled the intake manifold off after trying to start it several times and it was full of gas. Trying to diesel when I shut it off and not wanting to idle down. 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. Just over idle to about 1/4 throttle it backfires through the intake. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously. Qty: Details Fitment Instructions LC Pro Air Intake Kit INSPECT INTAKE, EXHAUST MANIFOLDS AND AIR INTAKE CHAMBER Using a precision straight edge and thickness gauge, check the surface contacting the cylinder head or intake manifold for warpage. I can not get it to start, it will just crank and backfire through the intake. Having similar problem. Customer: Toyota 22RE engine. The intake valve opens and ignites the new intake charge. Mar 23, 2010 · I have an 84 toyota pickup with a 22r engine. dont backfire out the back just up the carb and its over and over not just one time. 2. Aug 17, 2015 · Couple of things to help lead you. Idk much about the 88' setup, but check if your Hot Air Intake is hooked up. 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. any ideas or is it a valve problem? thanks rob. 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 Dec 8, 2014 · I just repaired my honda eu3000is. It only does it when you're give it more than 1/4 of the throttle. 6 liter engine. Working on a 86 toyota 4 cylinder 22re efi pickup truck Timing jumped a tooth or so and broke one of guides and cover. Part Number: 1061509. like getting on the highway when I'd have to push it a bit to get up to speed. Lacks power, I can barely do 55 and have to ease into the throttle to keep it from backfiring. {ie - check valve clearance - hot - possible weak valve springs} May 18, 2010 · 87 4x4 carbed is backfiring through carb when i open the throtle all the way and is gutless. Oct 5, 2015 · 1987 - 1996 F150 & Larger F-Series Trucks - 1988 5. You really should use a tach & dwell meter. Intake gasket leaks. Pull the plugs, plug one of them into a plug wire and hold the end of the spark plug against the valve cover (to ground it) have a buddy hold the plug and you crank it. 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. The exhaust has a strange smell, more like fuel than oil. Manual choking the carb does not cure the condition. There are other issues backfire(?) through the carb can be caused by: (1) intake valve just opening or possibly sticking while the next cylinder in the firing order is progressing through the cycle known as valve over-lap. i did a dry test and the comp was 150 new coil and all that put a diff dizzy in it and still same thing. I put an afr gauge on it and it goes way lean just over idle, like 20afr on rear cylinder 18afr front cylinder. And as was pointed out "backfire" may not be true backfire, which is popping through the carb - backward through the intake system. Mar 17, 2012 · I've seen several 22REs with the harness rubbed through under the intake plenum on the fuel rail. I've already changed out the EGR valve, and done the wires, plugs, rotor, cap, and air filter. Dec 15, 2011 · A common problem with emissions is the EGR tube is clogged at the elbow that goes back into the intake. 4? pushrods, ls9 head gaskets, ls7 lifters. It's the connection that goes from your exhaust heat shield into the air intake tube; this dumps warm air into the carb, making things warm up faster. Then while testing saw bubbles out the front of the intake near the water Jan 6, 2006 · Swaped mine this weekend, i ran a hose through the radiator support into the air box, runs cleaner for me, (found out my air intake and filter were nearly cloged with mud from the dumbass who had the truck before me) ran the battery cables all the way around the fire wall and moved the harness that goes over the valve cover down inbetween the intake and block, looking alot cleaner, next is to May 30, 2012 · Put it in first gear and started down the road shifting gears and so on. I come back out and start to accelerate and i heard it backfire through the intake once. New everything (except fuel filter it, probably has 4000 miles on it). ) Maximum air intake chamber warpage: 0. Backfires on deceleration going down a hill and the pedal is quickly pushed and released. My jeep is fine as long as i just give it about half throttle. 7 mm (0. it seems that along with the leak the truck has started backfiring when I gear down or decelerate using engine breaking and sometimes between gears when shifting. my thoughts are the intake valves are not seating fully but a shop just installed a new head less than 600 miles ago. 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. This unit had 1500 hours. (The backfire existed since I bought the car. Reason why you have no CEL or misaligned timing of the truck. That unsettling noise and the fear that something might be wrong with your engine are all too familiar. 2nd gear same thing, etc. But we didn't use 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. You guys read it as "Well I don't have a nitrous kit so that can't be it. Dec 6, 2008 · not really. Rocker arms for intake & exhaust valves on #1 cylinder will be loose. Feb 17, 2012 · 86 4runner, 22re, 5 speed. Now it runs great at wot, but if you accelerate modestly it tends to be really tentative, and then once you back off the throttle at cruise speed it will often backfire through the carb once or twice. Issue was the generator wouldn't start and was backfiring through the carb. removed clogged pre cats and main cat ( helped tremendously ) 3. I will remove the intake in order to get a closer look at what's going on. I used nitrous kits as example of how a backfire occurs in an intake manifold. It sounds like it is coming from in the dash. The datalog you are looking at is with that carb, and it is backfiring through the intake on this engine. that Dec 15, 2024 · Toyota 22R Engine Specs. at a total loss with it right LC Pro Air Intake Kit 22RE 1989-1995 : Our Price: $ 302. Let’s take a closer look at the engine specifications of the Toyota 22R. Jul 9, 2020 · Okie is correct, backfire through intake is a "Lean" pop. Once it racks out to around 2500 rpms, it just shuts down and sputters. Part Number: 1061508. new cap,rotor,plug wires ,plugs at time of service. I have put a new chain and cover on and everything is back together. Either you are lean, or your are firing out of time via bad wires, wire routing, or mechanical timing failure. injectors stuck on, fried drivers in the ECU, or A/C amplifier (that's what mine did), etc Dec 2, 2011 · 22re backfire through intake at about 3000 rpm Jump to Latest 2. You can go through Jun 9, 2006 · x2 on the auxiliary accelerator pump. The problem gets less noticeable after the truck warms up, but is still bad. It was produced by Toyota from 1981 to 1995 and was used in various Toyota trucks and SUVs, including the popular Toyota Hilux and 4Runner models. Any help would be GREATLY appreciated. If you are going pane and a turbo just get a 22re with a mechanical dizzy or a 22r with a EFI intake plume/throttle body. Quantity in Stock:4. as in pilots, water in the bowles, CV slides not reacting as in sticky or split diaphram, way too small main Dec 22, 2005 · 22re Low rpm miss Jump to Latest 5K views 5 replies 5 participants last post by zuking101 Dec 25, 2005 Feb 11, 2021 · This is a 22r with a carb. Jan 4, 2011 · today i was driving around, and my car was up to operating temp, well i stopped at a friends and i reved up my car a little (to 2500-3000 rpm) well when it hit 2500 it like stopped going up and i heard a pop like a backfire that sounded like it came from the intake, i immediately took my foot off the gas, the car ran completely fine besides that, a few hours later i got back in my car and May 19, 2020 · Backfire in intake can be lean fuel mix or spark timing, and maybe even a burnt or sticking valve If engine was warm already then lean fuel mix can self ignite when intake valve opens and lean mix is sucked in, it ignites while intake valve is still open, so backfire Vacuum leak can cause the Lean mix This can't happen with cold engine LC Pro Air Intake Kit 22RE 1985-1987 : Our Price: $ 237. But it's almost become a term that covers both in general public terms. You have a backfire issue which says excessive gas which also will make you fail emissions. I pulled the ignition coil off the distributor and it does not backfire when I try to start A carburetor likes to be about 70F to properly work, and will be finicky until it warms up. This is an odd problem for me. Jump to Latest 21 - 40 of 45 Posts. I'm thinking O2 sensor. Improper Fuel-Air Mixture. Since '88 I've had 4 of these trucks; 3 22r's and 1 22re and have never had a problem like this, but "there's always a 1st time. you can swap from a 22r to a 22re but you must also swap the entire vehical wiring harness to do it right. Actually, it backed itself out when I dynoed the car (see sig). ) Jan 23, 2006 · Duramax Diesel Hesitation or Backfire 2005 Chevrolet Silverado 2005 GMC Sierra with 6. 6L but that is a expensive swap not Dec 17, 2024 · wanted to chime in on backfire through intake/carburetor. May 8, 2011 · Hey, i have a 94 pick up 4x4, 22RE engine. 008 in. Jul 8, 2007 · I'm trying to diagnose a backfire in my 71 Cutlass. You would think the lash was too great of a gap. Nov 24, 2008 · Ok well, thought I had things sorted as I got it to idle decently, albeit roughly, but when I plug the hoses back in on the distributor it backfires through the carb if I try and rev the engine. If the exhaust is not opening, the compression will blow through the intake valve because it wasn't passed through the exhaust valve. Jan 26, 2009 · Recently it did start to backfire occassionally, but after messing with everything, I'm sure my timing, TPS, and other things are not correctly set. Bad plug wires can also short onto each other and cause the wrong cylinder to fire while it's intake valve is still open, igniting back into the intake. Maximum intake warpage: 0. So far I changed the pump, filter, set timing, adjusted TPS, cap rotor, denso plugs, wires. Is it backfiring through the intake or exhaust? So it starts and runs fine until it gets warm? My truck has similar issues with wet black soot out of the exhaust and intermittent hard starting when hot. What I then discovered after placing the nozzles back in place with the engine being cranked were FLAMES shooting out of each of the 6 intake runners in the plenum!! I couldn't believe this! The engine is now backfiring up through each of the intake runners. I can't remember specifically if it pops through the intake, it may. 29's, 36 tsl's, lockrite and spool, and a complete disregard for body damage alot more mods in the works 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, Feb 12, 2017 · I never could get the fuel dialed in without it backfiring through the intake so I resorted to a carb that was pulled from a similarly equiped 302 mustang which didn't exhibit any significant stumbling or backfiring problems. Depending on which wires rub through you can have all sorts of havoc. It has a 4. I put it back to stock for now until then. When it's cold, and I nail the throttle, it backfires through the intake. you can hear a popping noise. Charles. 88. my question is this: is the backfiring caused by the exhaust leak or is the engine out of tune? Oct 2, 2011 · Take your pick. 2 Engine: Specs, Configuration, and Service Intervals 02/01/2025 Feb 7, 2024 · Unraveling the Causes of Engine Backfire through the Intake. Trouble code 2 states: Open or shorted Air Flow Meter (AFM) circuit - Defective AFM - Defective Electronic Control Unit (ECU) Trouble Code 8 states: Open or shorter Air Thermo Sensor citcuit - Defective intake air thermo sensor circuit (see AFM) - Defective ECU Tests already performed: Jan 2, 2008 · The 2nd thing Vortecs are notorious for. Mine have gone out 2 times since new in 99. Mar 21, 2011 · As it should be. Nov 4, 2007 · 1. 3 swap? Jan 27, 2013 · Most likely cause of my intake backfiring was #5 & #7 plug wires switched. I've got a 3236 carb with a torque cam bored 30 over, offey Houser intake and I get a backfire when I throttle up on the gas so I'm wondering if I go smaller jets with that help. Jun 30, 2010 · Toyota - Truck and 4Runner 22re misfire and backfire through throtle body Aug 4, 2012 · The flame front can then travel up the intake and cause a backfire. What ive done so far to the engine is:-Denso plugs-Accel Coil and Wires-Upper intake manifold gasket-valve cover gasket-cone intake-cam seals-egr delete-vacuum delete Jan 27, 2013 · The 20r,22r,22re,22ret all have the same mounts and tranny bolt patterns. But it turned out to be not enough gap on the exhaust. Motor is freshly rebuilt and bored 30 over Injectors are freshly rebuilt and flow tested plugs (ngk) wires (ngk) cap and rotor are all new, coil is not nor is igniter ($$$) Sep 8, 2005 · my truck with the 22re has had the same problems, cleaned the intake, replaced fuel filter, cleaned throttle, cleaned egr . First put a vacuum gauge on it and tell us what it reads at idle and if it widely fluctuates. My first symptom was coolant pressure test failed. Usually the diaphram will be ruptured causing the engine to suck raw fuel in causing a rich condition. I had this happen to me when I first fired my motor (timing on distributor was off) and I blew my charge pipe across the shop and against the wall. I've been through every post I could find here and at Pirates and here's what I tested: * No codes from CE light * Checked and set timing (was 1-2 deg advanced) * New plugs, wires, cap & rotor Nov 20, 2004 · Ordinarily, backfiring in the intake is an overlean condition. In neutral if you hit the gas quick/hard, it ALMOST sounds like its backfiring in the engine bay. Will not start, timing is set (TDC, rotor pointing to #1 cylinder wire). there is always an air/fuel mixture in the intake when the engine is running. If you rev it up 3-4 times the bog will go away in neutral. Jan 21, 2018 · C6 Tech/Performance - Back firing through intake - Need some advice, I recently cam swapped my twin turbo ls3. Check the dipstick, its not burning oil and the oil level is not increasing. Second, how did did you set the points after you set the timing ? that should have been done after the timing chain replacement. 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 goes away but will slightly return when i step on the gas again. ) Maximum exhaust warpage: 0. backfire(?) through the carb can be caused by: (1) intake valve just opening or possibly sticking while the next cylinder in the firing order is progressing through the cycle known as valve over-lap. I drained the manifold and managed to start it a couple of times then it quit running again. Good luck and hope this helps, check the carburetor settings to make sure it's not running too lean and the timing . Aug 29, 2014 · Hey guys, I have an 83 pickup with a stock 22r. The intake valve is a component of the intake manifold. ueu csymrc bzxuun atl bgeqb eoxbeu hug vmcfg vednc azft