Knife

So, my 2004 S4 (35,500 non-abusive miles) started running very rough, like it was missing or starving for fuel or something.

I ran VAG-COM and got the following error codes:

"VAG-COM Version: Release 409.1-S

Control Module Part Number: 8E0 910 560 A
Component and/or Version: 4.2L V8/5V G 0020
Software Coding: 000XX8822
Work Shop Code: WSC 25663

6 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded
16686 - Cylinder 2 Misfire Detected
P0302 - 001 - Upper Limit Exceeded
16687 - Cylinder 3 Misfire Detected
P0303 - 001 - Upper Limit Exceeded
Intermittent

16690 - Cylinder 6 Misfire Detected
P0306 - 001 - Upper Limit Exceeded"

I assume this means I've got an ignition problem. Either plugs, or wires, or coils.

Can anyone tell me, from looking at those codes, anything more specific? Like, where should I start looking - Plugs? Coil packs?

Also, just in case I want to go that route, the care is recently out of warranty, anyone have an idea of how much it would cost to bring it to Audi for the fix? If it's not like, half a million dollars, I just might let them diagnose and fix it.

Thanks in advance.

bearthebruce

<ul><li><a href="http://wiki.ross-tech.com/index.php/16684/P0300/000768">http://wiki.ross-tech.com/index.php/16684/P0300/000768</a</li></ul>

Knife

It's not the plugs or the coils, unless like, almost all of the coils are bad. I put in new plugs and moved all the coils around today and I'm still getting random misfires on a bunch of cylinders (some the same as previously).

I was thinking it might be fuel or fuel filter and the Wiki indicates that might be a possibility.

Any chance this is Audi/the ECU's way of telling me I've ignored my regular service intervals for too long?