Montana :: Cylinder 3 Misfire Code After Intake Gasket Change
Dec 23, 2012
I am currently getting cylinder 3 misfire code, after intake gaskets are installed. Here's what happened:
installed intake gaskets and reassembled
detected cylinder 1 misfire only
cleaned cylinder 1 spark plug & wire connectors and cleared the code
detected cylinder 5 misfire only
cleaned cylinder 5 spark plug & wire connectors and cleared the code
detected cylinder 3 misfire
checked all of the spark plug wires resistance
found cylinder 2 wire was bad. (over 20k ohms/meter)
replaced all six spark plugs and wires.
Please refer to the OBD reading attached...
There was a few excellent threads about cylinder 3 misfire issue : [URL] ....
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After replacing most of the underside of my Super Duty, Complete front end, backing plates, brakes, rotors and shocks, I have a misfire code on cylinder #4. I replaced the plugs, cleaned the MAS and filter and rotated the coil to cylinder #1. Still have a misfire on #4 and noticed the coolant slightly low and some condensation on the oil cap. Could this be the intake gasket? My mechanic is away for 2 weeks and I think the price at the dealer will kill me. I have 63K on the truck, don't tow and plow mostly family members. It's getting a little rusty but is still in good shape.
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My car has been sitting for almost 2 years now so I decided to start it once again after fixing warped turbo and manifold flanges. Immediately after starting it we noticed a misfire on cyl 3. checked plugs, coils injector harness and all looked good. Then we realized that I lost compression on the back 3 cylinders, I did a wet compression test and nothing changed (worst being cyl 3 at 80 psi), engine warm and cold tests. Then a friend and I did a leak down test and it seems like the intake valves are leaking and the rings are good.
Before I remove the head and have tons of work done to it I wanted to check a little further so I started tearing the short runner intake manifold out and valve cover. with the valve cover out, the springs and cams etc looks all in good shape. Then the intake runners were covered with a lot of oil which is weird because I dont have my crank case vent recirculated to the intake and my turbo seals are not leaking (no oil on the inter-cooler piping), and it is not just fuel in there.
Now if my valves are leaking air out the combustion chamber could they also be leaking from the valve stem guides? I didn't notice excessive oil being burnt through the exhaust which is normal when that happens on cold starts. So I am confused on where the oil is coming from or how it is being pushed to the intake runners on the head and manifold.
I have had a bit of blow by, normal on my case, because when the low compression pistons were installed the rings were gaped a little more to account for high heat at high boost pressure.
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2002 Montana code P0304 light was flashing now solid, swapped coils no change, new plug and wire no change, found air box plugged solid from hibernating mice cleaned out thats when light went from flashing to solid still misefire. I've been told its the injector.
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I'm getting oil and fuel into the intake manifold every couple hundred miles. Oil level is in the middle of low and full mark. It's not like it's a huge amount of oil and fuel in the intake but it's enough to make the car misfire, bog out. Only codes I'm getting are misfire codes for all cylinder and reduce engine power code (forgot what code it actually is) but that's when the car completely shuts down and won't start with red triangle light. If I clean the intake out and unplug the battery for a few min I'm able to start the car again, but it will run really rough and white smoke will start to come out the exhaust (gas smell). I'm wondering if a bad maf would cause this. I've already cleaned it but still doing same thing. Don't really know what the specs or reading the bad is suppose to be so I'm kinda stuck to determined if I need a maf or not. Cars got about 242K miles.
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It has been running very smooth since I changed the lower intake gaskets, and I just went on a 1500 mile round trip roadtrip. It ran perfect the whole way, getting 22mpg to boot. In the last 50 miles, the CEL came one. The code read P0420 which is the cat converter? I dont want to fork up for a new one, are there any tricks to get this fixed or cleared?
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I am having a misfire code on the #1 cylinder. Its not bad but I really want to nip it in the butt before it goes out completely. I was told to try and get some of the older style coilpacks that bolt on and go with them. Can I put them on my 03 passat 1.8t.
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1989 Nissan pathfinder. 6cylinder - VG30i - Manual trans - Throttle body injected. No CEL.
I've been trying to diagnose a misfire on my 89 Pathfinder during my lunch breaks. I just changed out the the plugs, dist. cap, dist. rotor and wires. Still misfiring.
When it starts-up the misfire "putt" is random, but once the idle lowers to about 1k it gets very rhythmic and just sounds like part of the idle and the car vibrates a little too much. Stinky exhaust (obviously) but no blue smoke or anything.
Finally bringing the car home to do some diagnosis over the weekend. Next I'm going to do some cylinder compression checks and vacuum checks. Probably check fuel pressure too. Is it odd that I'm not getting a cylinder misfire CEL code? The manual lists the code type.
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So I have A 2000 Chevy and i keep getting a code saying i have a misfire on cylinder 8. i have replaced the spark plug, i have replaced the coil. this code is still showing up. what else could this be?
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PO302 CODE . Lets hope that it's only cylinder 2 coil or spark plug !
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I have a 2002 pontiac montana that needs the head gasket replace. Mileage is 152,000 miles with a v6 engine. I would like to get at least another 75,000 miles once the repair is done. Is it worth doing as alternative is to scrap the van and buy a new vehicle...
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Have '01 SE. yesterday I got a misfire in cylinder 4 (code P0304) the service light blinked on and off 3 to 4 times than stayed solid. changed plugs and boots about 1 to 2 months ago, didn't change coils and they r not in the best shape but didn't have money to replace at time. So I replaced the coil for #4 and it still runs rough with code, plug has some ware but looks fine.
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I left my chevy s-10 truck sitting over the christmas (23/24/25) and it was really cold outside and when i got back i started getting a P0304 (Cylinder 4 Misfire). I replaced the spark plugs and spark plug wires. May be the cold would cause this to happen? I think I've noticed the trucks fuels efficiency drop over the past month). May be the fuel injector(s)? Is the s-10 TBI or does it have fuel injectors for each cylinder?
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2000 Jetta GL 2.0 AEG. I am receiving the P0304 which I have identified as Cylinder misfire #4. I read on some previous posts that I cannot be the distributor because if it was I would be receiving misfires on two cylinders. The spark plugs are OEM NGK and have been replaced recently.
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I posted this problem several months ago about a p301 code that my 2007 Prius has been generating. I eliminated all the easy stuff... plug, spark unit, fuel injector. Over the past year since I've had the car, the CEL light has gone on for a couple months then shut itself off for a couple, then back on ... probably has shut itself off 3 times in the past year, each time staying off about a month or two before coming back on. Some background on the car, supposedly the PO hit a rock and damaged the motor about 2 years ago and had the short block replaced.
Anyway, the CEL has been on again for about a month, and I got a notice for Illinois emission testing, so I decided to take it in to the dealer and have him do a diagnostic so I can get the emissions passed. After an hour and a half of testing they told me that the best they could ascertain, the car has been submerged in water, as there is a lot of rust in areas that never get any rust, and they think there's a short somewhere.
The service manager at the dealership said if it was his car he wouldn't spend the money for another 5 hours of trouble shooting, and if the car runs good he'd just drive it as is. They cleared the CEL and the service manager just charged me for an oil change as they caught a recall on the steering that hadn't been done and figured he'd let me slide on the hundred for the diagnostic.
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Alright so my car is popping up 4 codes.
P0411 - Secondary Air Injection System Incorrect Flow Detected
P0300 - Random/Multiple Cylinder Misfire Detected
P0302 - Cylinder 2 Misfire Detected
P0303 - Cylinder 3 Misfire Detected
Vehicle: 1999.5 VW Jetta MK4 2.0L GLS (AEG)
The P0411 code I have had for a while now and I been lacking to fix it. I pretty sure I can get this fixed but it doesn't cause problems so I haven't paid to much attention to it. Anyways, the other day I noticed a puddle of coolant under my car so after checking it out, the water pump was leaking so I bought a new one and replaced the old one. However, during the replacement process I had to remove the timing belt and I accidentally turned the top pulley about 1 notch and didn't notice at the time. After putting everything back on, I turned my car on and the engine sound a bit weak so I ran for about 10 minutes around a couple blocks.
I instantly noticed that the car had no power and it took me a long time to speed up. When I got back, I plugged in my scanner and I only had the same P0411 code and nothing else. After carefully reviewing the camera I had recording during the water pump replacement, I notice I had turned the top pulley a bit so I went ahead and removed the timing belt, readjusted it, and it worked! I was excited that the car was working fine again. Soon after, I headed out to take a drive and noticed after 60MPH the car didn't have much power. The car still accelerates after 60MPH, but extremely slow. As soon as I arrived back home, I plugged in my scanner and that is where I seen the 4 codes. Now my question is what could have caused this? Could I have damaged something when I ran my car with the incorrect timing?
Things I have done so far:
-I checked to see if I left anything unplugged.
-I checked for any vacuum leaks
-I checked my oxygen sensors so see if I was running rich/lean
Things I will do after work today:
-Check the spark plugs
-Check spark plug cable for damage
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I recently changed my spark plugs + coil packs in my 01 1.8T because it read a couple cylinder misfire codes. Drove it for a few days out of curiosity plugged the code reader in again and it's still reading misfire codes. What could the issue be still?
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Started happening recently where I can't bring her past 5k without misfiring on cyl 2 and throwing the p2181 code. I changed the coil just to be sure, but I do know my coolant sensor wires were a little snug from the TB being so close.
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It keeps reading the code P0303 "cylinder 3 misfire". All coil packs, fuel injectors, spark plugs have been replaced. The exhuast smells normal. The oil is the correct color(maple syrup color, NOT milky). It's not blowing through coolant. Compression test came back normal. It's not the cat converter because the exhaust doesn't smell like rotten eggs. The car is sometimes hard to start. it hesitates/stumbles and shakes really bad. It feels like its not getting enough power.
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I just purchased a 2005 Santa Fe, 4WD, 2.7l..the engine has a miss...the code that came up was "misfire in #2 cylinder"..I checked the coil pack...and the wire harness just crumbled..so I replaced the coil pack...reset the code..and it was good for a couple of days...I got through inspection...today I put on the A/C..and the engine got rough..the check engine light came back on..same code..misfire in #2..I'm thinking the injector or what else could it be? plug? wire?
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