shwndh

for the past week or so until today. Here's what I got:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 8E0 909 559 E
Component and/or Version: 3.0L V6/5V G 0001
Software Coding: 0016711
Work Shop Code: WSC 63351
5 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 008 - Implausible Signal - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 008 - Implausible Signal - Intermittent
16686 - Cylinder 2 Misfire Detected
P0302 - 001 - Upper Limit Exceeded - Intermittent
16689 - Cylinder 5 Misfire Detected
P0305 - 001 - Upper Limit Exceeded - Intermittent


And here's the complete auto scan.

VAG-COM Version: Release 311.2-N


Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,15,16,17,26,36,37,45,46,55,56,63,76

Address 01 -------------------------------------------------------
Controller: 8E0 909 559 E
Component: 3.0L V6/5V G 0001
Coding: 0016711
Shop #: WSC 63351
5 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 008 - Implausible Signal - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 008 - Implausible Signal - Intermittent
16686 - Cylinder 2 Misfire Detected
P0302 - 001 - Upper Limit Exceeded - Intermittent
16689 - Cylinder 5 Misfire Detected
P0305 - 001 - Upper Limit Exceeded - Intermittent
Readiness: 0000 0001

Address 03 -------------------------------------------------------
Controller: 8E0 614 517 H
Component: ABS/ESP allrad 2328
Coding: 04495
Shop #: WSC 06435
No fault code found.

Address 08 -------------------------------------------------------
Controller: 8E0 820 043 K
Component: A4 Klimaautomat 1016
Coding: 00000
Shop #: WSC 63351
No fault code found.

Address 09 -------------------------------------------------------
Controller: 8E0 907 279 E
Component: int. Lastmodul USA 0305
Coding: 00013
Shop #: WSC 63351
No fault code found.

Skipping Address 15-Airbags

Address 16 -------------------------------------------------------
Controller: 8E0 953 549 L
Component: Lenksáulenmodul 0308
Coding: 02041
Shop #: WSC 63351
No fault code found.

Address 17 -------------------------------------------------------
Controller: 8E0 920 950 L
Component: KOMBI+WEGFAHRS. RB4 D35
Coding: 03200
Shop #: WSC 07117
WAULT68E13A164327 AUZ6Z0B0252820
No fault code found.

Address 45 -------------------------------------------------------
Controller: 8E0 951 177
Component: Innenraumueberw. 0604
Coding: 00001
Shop #: WSC 00000
No fault code found.

Address 46 -------------------------------------------------------
Controller: 8E0 959 433 BB
Component: Komfortgerát T7B 1311
Coding: 16200
Shop #: WSC 63351
1 Fault Found:
01403 - Glass-Break Sensors: Rear
36-00 - Open Circuit

End -------------------------------------------------------
I figured it was a CP going bad but kinda hard to diagnose when almost all of the Cylinders are showing misfires. Any ideas? Replace all? This happens like once ever 3 months after hard driving.

audix

Try new spark plugs first.

shwndh

Really. Spark plugs are only a year old but I guess I could try that.

quickaudi:STFA

how are your usual maintenance items, like air filter? O2 sensors? how about your ignition amps? cleaned your MAF?

shwndh

They were installed by my indy shop about a year and 4 months ago. At the same time, I had replaced all my coil packs because we were chasing down a mysterious intermittent misfire count seen in VAG-COM on all cylinders but the engine is perfectly smooth. Although we never found the source, they just seemed to disappear after several tanks of 93 Chevron with Techron, but every now and then I can still monitor them at idle. Another tech thinks it could be the engine speed sensor and the misfire codes are false.

I bought the car used a year and a half ago with 118k on the clock (03 3.0qms) and it was maintained by the dealer per schedule. Since I've had it, I've just changed:

* Air filters (2X)
* Fuel pump & filter (recall, but no issues)
* All 6 coil packs (had no issues)
* Timing Belt was done at dealer per schedule
* And 3 Full Synthetic oil changes (car has always had full synth)
* Some broken vac lines

I've not got 140k miles on the car and besides these intermittent misfire codes every now and then, the car runs like it was new. I just started having the Flashing CEL and bad CP symptons this past New Years day. I figured it was a bad CP but can't seem to figure out which one. I'm baffled.

I'm going to pull the plugs and check the gaps later on today since I didn't see them put them in. I'm assuming the gap for a 3.0 is .032<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/1010050.phtml">Check my old post</a></li></ul>

diagnosticator1

I think its a faulty crankshaft speed sensor. You can log the sensor output waveform over time and see if the output is glitchy with signal drop outs, etc. When you are observing phantom misfires at idle speed, a scope monitoring the crank speed sensor will likely show output signal faults occuring at the same time and rate as the phantom misfires.

shwndh

You've said this may be the culprit before but I didn't know there was a way to see it in VAG COM.

diagnosticator1

monitored by inductive pickup directly, and the signal waveform viewed/logged on a scopemeter.
Replacing the crank speed sensor speculativley, is the alternative.

shwndh

The Bentley sucks!

diagnosticator1

YGM..