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Misfire cylinder 4 ???
Posted: Tue Aug 07, 2007 1:40 pm
by mattykerby01
Hi,
Have the following fault codes when driving the car hard - can anyone shed any light for me?
Car has just been serviced with new plugs.
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
Coil packs maybe? Where is cylinder 4?
Cheers
Matt
Posted: Tue Aug 07, 2007 4:19 pm
by TopBear
How did you get those codes, i.e. have you got VAG-COM?
You could try resetting the DTC codes, and then measuring the blocks 14+15 to see at what revs the misfires occur.....alternatively give MRC a call, and ask Doug or Minhea what can cause this, however from memory it could be either of the following......
a) Coil pack
b) Spark plug
c) Defective Injector
d) Crack in cyclinder head
e) Worn camshaft lobe\follower
Mines was option e
Posted: Tue Aug 07, 2007 5:14 pm
by mattykerby01
Many thank for that - any idea which one is cylinder 4 - i am going to swap this with another coil pack and see if the problem follows.
Ta!
Re: Misfire cylinder 4 ???
Posted: Wed Aug 08, 2007 7:08 am
by Norrs2
mattykerby01 wrote:
Car has just been serviced with new plugs.
Matt
Although my car appeared to be running ok, when getting a MRC re-map they did a health check and found a random missfire. It just turned out to be loose plugs on both centre cylinders. A common fault according to Doug, by dealers who don't tighten them properly. Where did you get the car serviced? It may be just that simple!!!
RE: Re: Misfire cylinder 4 ???
Posted: Wed Aug 08, 2007 7:22 am
by grizz
Matt ,
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
I've had these on several cars when the MAF is on it's was out .
RE: Re: Misfire cylinder 4 ???
Posted: Wed Aug 08, 2007 9:35 am
by derdle
I had exactly the set of faults (on cylinder 6 though) .... cured by Doug (of course). Great expense...he tightened the spark plugs!
My suggestion is to go round all 6 plugs and re-tighten them, clear the fault codes and then drive the car for a while and re-test with Vag-com.
Paul
RE: Re: Misfire cylinder 4 ???
Posted: Wed Aug 08, 2007 10:04 am
by neily
this is spooky.....
Doug had to retighten mine last week whilst he was going a few other bits and pieces for me....
RE: Re: Misfire cylinder 4 ???
Posted: Sat Aug 11, 2007 11:19 pm
by Harper--D
"spooky"? Sounds like Audi has fvcked up again!!!
RE: Re: Misfire cylinder 4 ???
Posted: Sat Apr 25, 2009 8:08 pm
by dr.sah
EXHAUST CAM IS DAMAGED.
Re: RE: Re: Misfire cylinder 4 ???
Posted: Sun Apr 26, 2009 11:01 am
by rtd
dr.sah wrote:EXHAUST CAM IS DAMAGED.
thats a really helpful comment - NOT.
RE: Re: RE: Re: Misfire cylinder 4 ???
Posted: Sun Apr 26, 2009 11:27 am
by Contigo
I'm guessing that sah has recently had cam issues and he's seen this vag code from this here thread and thinks it's the same.