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Author Topic: Cylinder Misfires 3/4 -Only on VCDS not DTC  (Read 1420 times)

Offline Rav2011

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Cylinder Misfires 3/4 -Only on VCDS not DTC
« on: July 28, 2012, 05:11:54 pm »
Hi Guys,

I have a problem with 3/4 cylinders on my car misfiring. Coincedentally, I also get a B1 S1 too rich condition.

Now there is not DTC on the car for the misfire as I only get a DTC for the too rich condition.

From my understanding the coil packs were changed on my car last year (VW Recall) at that point I also replaced my sparkplugs with colder Denso Irridium spark plugs.

I wonder if it is the spark plugs or the coil packs that have gone bad? Why would they go bad so quick? I have probably only covered 5,000 miles since the change.

Rav

Offline bacillus

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Re: Cylinder Misfires 3/4 -Only on VCDS not DTC
« Reply #1 on: July 28, 2012, 08:37:17 pm »
There has been a bad batch of coilpacks issued in the VW recall so it could still be a bad coilpack.

Try switching coilpacks 1 and 2 with 3 and 4. If the misfire moves then it's faulty coilpacks.
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Offline Rav2011

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Re: Cylinder Misfires 3/4 -Only on VCDS not DTC
« Reply #2 on: July 29, 2012, 11:35:00 am »
3 out of 4 are misfiring, it could even be all four in then end.
So the scope for me moving the packs around is limited.

Maybe i should just deal with VW?

Offline bacillus

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Re: Cylinder Misfires 3/4 -Only on VCDS not DTC
« Reply #3 on: July 29, 2012, 11:52:21 am »
Hmm, as you are using colder plugs, have you checked to see if they are fouling?
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Offline Rav2011

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Re: Cylinder Misfires 3/4 -Only on VCDS not DTC
« Reply #4 on: July 29, 2012, 12:31:35 pm »
No not yet, I suspect there will be fouling evident, due to the car running rich.
 
The thing is if it was a true misfire then why no DTCs? I can only see the misfire count on each cylinder in VCDS.

Offline bacillus

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Re: Cylinder Misfires 3/4 -Only on VCDS not DTC
« Reply #5 on: July 29, 2012, 01:16:56 pm »
The thing is if it was a true misfire then why no DTCs? I can only see the misfire count on each cylinder in VCDS.

You only get a fault code stored if the misfire count exceeds a certain threshold value.
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