View Full Version : Yet Another Missfire thread

04-27-2013, 12:37 PM
So my vag com is throwing missfire code on my v6 3.0 yet i have not check Engine.

Address 01: Engine Labels: 06C-909-559-ASN.lbl
Part No SW: 8E0 909 559 L HW: 8E0 909 059
Component: 3.0L V6/5V G 0020
Coding: 0016711
Shop #: WSC 63351 000 00000
VCID: 3E7925EE6A32F0E8130

2 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - - Intermittent
16690 - Cylinder 6
P0306 - 008 - Misfire Detected - Intermittent
Readiness: 0000 0000

So what i want to know iS what could be the Cause of the missfire.

My Coilpack have been replaced by VW last year and just changed my Spar Plug.

Also my Engine sound like my wife TDI lol... *O.o

04-27-2013, 02:04 PM
Also i want to do a compression test, Do i need to Disconnect the ECU so it disable the Ignition system and fuel system at the same time ?

Or is there a special precedure on these car ???

Thx guys.

04-28-2013, 12:17 AM
cylinder 6 is misfiring.. check it ,unplug the spark plug 6 wiring and make sure its reconnected good. open up the plastic cover connecting the wires and follow see if you see any frays in the wires that would allow a "electric short or electric leak" from another wire causing the misfire.. have you changed your fuel filter?

the sound is not good ? does it idle like that or just under acceleration. I got some valve chatter but thats from sludge. what side is the engine noise coming from..listen carefully..

04-28-2013, 10:25 AM
I didin't change the fuel filter, But guess i will.

The sound is only bad at Idle and is comming from the middle of the engine where the intake is.

You have any idea how to do a Compression test on these engine ?

02-10-2014, 12:23 PM
go to your local part source, napa auto parts... etc and rent/borrow a compression tester. all you do is unscrew the sparkplug on the cylinder which you want to test and screw in the tester. start the engine and read, im pretty sure you can check it just by cranking it without starting it (take out fuel pump fuse)