Golf/GTI VI :: Vibration And Misfire During Cold Start
Aug 1, 2013
Couple months ago I noticed that my car was experiencing rough idle, stuttering exhaust note during cold start. RPM is very stable!
Forward 4-5 months to last week, starting to notice vibration and it seems like the situation has gotten worse. The car returns to normal after 1 minute or so depending on how long it has been sitting there for. For example, If I park there for 30 minutes and try to start the car, I can feel a little vibration for up to 10 seconds. If it was parked for overnight, then the problem lasts up to one minute and then clears out. Now it's throwing a P0302 error which is cylinder 2 misfiring.
It's really like magic, the car would idle pretty rough and suddenly clears out.
I put in 4 brand new ignition coils and plugs, all OEM stuff and still hasn't worked.
This problems started during the winter time and I can clearly notice it's gotten worse and finally last week it threw the misfiring code.
I feel like something is failing or building up slowly. My car is a 2009 GTI TSI which has the same engine as the MK6 GTI.
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My 2010 gti has a p30030 misfire cylinder 3 only on cold starts. Swapped plugs and coil packs, still only on 3. Took a look inside every cylinder and found that there was some oil in the cylinder only cylinder 3. So much blow by that it kind of collected in the cylinder? Carbon cleaning needed?
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I have a 2009 VW GTI 6spd (42k miles) that has been misfiring at idle for about a month now. I can feel the engine shaking and see the CEL flashing at 900 RPM and eventually an EPC light comes on and makes the car run very sluggish. The EPC light turns off if the i turn the car off and back on. The car runs fine and without any misfires after start up which has me stumpted as to what it could be.
I've taken it to San Tan VW in Gilbert, AZ 3 times.
1st time they said it needed a 40k mile service to correct the misfire which included oil change, fuel filter, air filter, spark plugs, fuel injector clearner and a tire rotation They said spark plugs was causing the misifre so i replaced the plugs but the misfire was still there.
2nd time they said the injectors have carbon build up and recommended to run 2-3 bottles of fuel injector cleaner + octane booster per tank for about 2 tanks and that will fix the issue. That didnt work either.
3rd visit they came to the conclusion that it had massive amounts of carbon and needed a "walnut blast". They recommended to look else where for cheaper labor rates on the blast.
Also, need to understand why the car only misfires at 900 RPM if there is carbon deposits at all times.
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I've had my 2010 GTI for 8 months now and have really only had one issue with it. When I start the car, it shakes before I start moving. Like, the steering wheel, body, pedals, gearshift, etc... It's not a violent shake, but definitely something I've never noticed in any other car I've owned including my MkV GTI. It doesn't seem like a normal feeling for a brand new car. I took it back to my original dealer at 4,000 miles and they said there was nothing wrong with it and they didn't feel any vibrations.
Well lately it's been vibrating more intensely and more often (at almost 8,000 miles) It now does the same thing while stopped in traffic or at lights. It's really annoying to me. I took it a couple days ago to a new dealer (I moved) and just talked to them on the phone. They also said there's nothing wrong with it and it's normal.
I forget exactly what they said it was because I was walking to the gym, but basically it was some cooling pump/fan that kicks on to cool the engine down and that's what is causing the vibration. But, they said it's normal and all VWs do it. I'm not quite sure why a fan needs to cool a perfectly cold engine in the morning though.
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Bought a 2006 (later production) with 25,000 miles over the weekend. Couldn't pass up the price and the warranty (1 year left + CPO). Picked up the car Saturday at noon..... had to drive to DC for business and the CEL came on when I turned on the car this morning. I researched at lunch that it could be a cold start misfire but I am already pretty heated about this. When I get home tonight I am going to plug it in to my OBDII scanner and see what I can pull. If it is something bad.... I am giving it back to the dealership.
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The last couple of times that I've started my W12 after sitting over night or longer I've noticed a misfire for 10-20 seconds and then it cleans up. Today the engine icon illuminated and after returning home I ran a VAG-COM scan which revealed these DTC's. There are 7 found faults at address 11.
My question is this- What exactly is causing this misfire issue? I'm assuming there is a faulty piece under the hood begging for attention but I don't know which item it is.
Everything else seems to be performing as it should but I see a few other faults showing up. Are any of those faults anything that needs looking into?
VCDS Version: Release 11.11.6
Data version: 20121223
Chassis Type: 3D - VW Phaeton
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Ok after finding out I had a bad battery @ Toyota shop they also say the scan is reading an exhaust leak ( I could hear that one ) they also say there is a misfire on cold starts should I worry and what could it be or is it a misread from the other two ?
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I get a cold start ignition miss on cyl #2, then goes away (with a little revving), car then runs 100%. No problems during hot re-start. 2005 1.8T AWM. I replaced all four plugs (NGK OEM), all four coils (OEM latest rev), Coolant temp sensor (temp gauge was flaky). No other codes other than Cyl#2 miss and Random Cyl miss. Could I have a leaking (fuel dribbles out) injector on Cyl #2, causing a too-rich misfire when the car is cold started??
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2001 V6 Passat with 125k miles throwing a P0430 code.
Having trouble on cold starts, takes about 10 minutes to finally get it to turn over. When it does the idle is extremely rough. For the first 1/4 mile the car bucks, stutters, and misfires. After that it runs fine and starts fine when already warm. I am noticing slightly decreased gas mileage but nothing major.
Valve cover gaskets were replaced 2 months ago, but were leaking oil for at least a year before I could afford to have them replaced. I am still noticing some oil leakage, however not as much as before. I have had both O2 sensors replaced twice in the past 5 years. Timing belt was replaced at 98k. What might be causing the starting issues?
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1991 Buick Regal, 3800 V6
Having a rough idle on a cold start. After some research and closer inspection of the vehicle, I'm quite certain I have at least one leaking injector that is flooding a cylinder and causing the car to misfire on a cold start. I'm also not at the gas mileage I should be at.
So I'm wondering, is fuel injector replacement as straightforward of a job as it looks? Any major issues I could run into in doing a replacement?
I'm planning on replacing all six injectors (I can get them for $50 each buying online with a discount code), but given that the vehicle is so old am I better off just replacing the faulty ones? I'm assuming pulling the spark plugs and seeing which cylinder is wet will tell me which I need to replace.
And one more question: Is there a way to depressurize the fuel system when I park the car for the night, thus preventing fuel (or most of it) from leaking into the engine until I get this fixed? I've read that just unscrewing the gas cap can depressurize the system.
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I'm experiencing vibration somewhere under the hood during start. I recently replaced the serp. belt and think it could be over-tensioned.
Possible?
Dangerous?
Or just the new belt needs to stretch?
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I recently took my car to the dealer as it is under warranty, 25000 miles on it... (I used to be a Toyota tech a while ago)
after a cold soak, the gas engine starts, but its very shaky, almost like a miss-fire. And at about 10-20mph when you go to accelerate lightly, to make the gas engine start, it starts vibrating again. but if you give it more gas, it smoothens out. Still sounds like a misfire to me...
But, there are no codes.
The dealer replaced all 4 injectors, performed a throttle body service, and an EFI Service, includes, fuel system cleaning, tank additive.
they told me the injectors for #1 and # 2 where not performing correctly and that they needed to be replaced. after opening a case with the infamous TAS (Toyota tech support)..
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After a cold soak, the gas engine starts, but its very shaky, almost like a miss-fire. And at about 10-20mph when you go to accelerate lightly, to make the gas engine start, it starts vibrating again. but if you give it more gas, it smooths out. Still sounds like a misfire to me...
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Car dumbie back again with another question.The diagnostic for my check engine light indicates numerous cold start misfire codes. The cylinders are OK. That was checked during the diagnostic.The fuel intake is carboned up. It is recommended that I clean the intake manifold. Does this mean cleaning the fuel injectors, the throttle body or both? 2006 Passat VW....
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When I start the car and its cold outside the car is shaking like a leaf for about 1 minute and when I arrive at 3000rpm there is like a vibration in the steering and in the pedals.
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Had my JoeZ exhaust installed at my first oil change at the dealership about a month ago.
Anyway, late last week I noticed on cold start in the morning I'm getting a metallic vibration noise. This is on gentle acceleration out of my subdivision. It disappears within a minute or less and doesn't re-occur until the next morning. Best way I can describe the sound is a cell phone set to vibrate sitting on an aluminum cookie sheet.
Any hints on what I can check that might be the culprit? I already checked to see if the muffler tips are hitting the exhaust diffusers but they're clearing and I can reach up around the canisters and fit my hand up around them so they're not touching that silver heat shield material.
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Well first the exact car I have. 99.5 Jetta 2.0 AEG. It all started with one loud backfire with a stall at a stop light while in neutral. After that it was random stalling and jerking while driving. So I checked my everything and all seemed well. I replaced spark plugs because they where fouled and nasty. Cables are good. They're near new and tested them with a multimeter. Next I checked my injectors and they are surprisingly very clean.
I had also ran seafoam prior to these problems a few weeks before it all started. Next step was new fuel filter. Old one was nasty and black stuff dripped out. That didn't work. So I checked for vacuum leaks with throttle body cleaner. Nothing. Visually threre is nothing wrong under the hood. So today I changed the fuel pump. Went for a test drive all seemed well. Can out of the bank. Then it won't start. So I wait like normally. And it normally gets me home. Nothing. Will sometimes start but if I'm not holding the gas it dies. I don't know what to do. My only other thing I can think of is the coil pack.
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I've noticed that she has to turn over a few more times than normal to start up. I don't have any engine mods and I'm approaching 10k miles. I've found a couple posts where people say their cars are a little harder to start when it's cold out, but I live in Hawaii and the temperature is never below the mid 60's.
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Summary of Events:
Lower radiator hose decided to disconnect itself.
Stopped and had car towed home.
Connected hose and filled coolant system.
Car is hesitant to start and takes a couple seconds of cranking.
Misfires in cylinder 3, and a few in cylinder 5, no other codes.
New OEM plugs, no change.
Swapped coil packs around, no change.
Idle is rough but at speed, everything is smooth.
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I was driving the car normal with no problem. Got to a red light stop an as I was coming out of the red light the car started to hesitate a bit. So I start to drive home as I was driving home my check engine start to blink and then it stay on. When I got home and park the car I shut off ,then start it up again then the check engine light was off but the hesitation was still there. Then I got my computer and got the vagcom and got this code :
16684-random/multiple cylinder misfire detected
P0300-008- implausible signal
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Went to work today at 330am 16 degrees outside. My car started up no problem at all. Got some fuel and drove an hour and half to work. No issues again. I was going out for lunch and the car wouldn't turn over. I check the battery. Solid 12.5volts. I have all my lights.. I even Tried jump starting the car! nothing. When I first got in it turned a little bit like it was trying too but it couldn't. I gave it fuel. Nothing. Tried again and it made some weird vibration then went to nothing...
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