Cylinder Misfires 3/4 -Only on VCDS not DTC

[Rav2011]

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

[bacillus]

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.

[Rav2011]

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?

[bacillus]

Hmm, as you are using colder plugs, have you checked to see if they are fouling?

[Rav2011]

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.

[bacillus]

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.