Hello all, I have a 2002 A4 3.0 V6 Quattro and Friday evening I had a cylinder begin to misfire. I scanned it and it is cylinder 4. I have searched through the forum and it seems this is probably a coil, ICU, or bad plug. The car is stock and has 46,000 miles on it. I would like to trouble shoot it by switching coils and what not to narrow it down and see if the code changes, could someone provide some instructions on how to do this; pictures would be great.

Thanks.
Joe

 

Note[/align]


Press pencil-type ignition coils into the openings provided on the cylinder head cover by hand.



6-cyl. 3.0 ltr. and 3.2 ltr. FSI engines



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Switch off ignition.



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Remove engine cover panel (if fitted).



Cylinder bank (right-side)



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Remove upper section of air cleaner









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Remove both bolts -1-.



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Push connector -2- towards pencil-type ignition coil, press catch down by hand and pull off connector.



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Use puller -T40039- to detach pencil-type ignition coils -3- from spark plugs.



–
Remove spark plugs using spark plug socket -T40039-.



–
Install new spark plugs.








Tightening torques
Nm

Spark plugs in cylinder head
30





Note[/align]


Press pencil-type ignition coils into the openings provided on the cylinder head cover by hand.



Cylinder bank (left-side)









–
Remove coolant expansion tank -arrow -.



–
Tie coolant expansion tank to one side with coolant hoses -1...3- attached.









–
Remove both bolts -1-.



–
Push connector -2- towards pencil-type ignition coil, press catch down by hand and pull off connector.



–
Use puller -T40039- to detach pencil-type ignition coils -3- from spark plugs.



–
Remove spark plugs using spark plug socket -T40039-.



–
Install new spark plugs.








Tightening torques
Nm

Spark plugs in cylinder head
30

[IMG]local://upfiles/12092/15431226D02B4EACBC8B017A5E6BE6CA.jpg[/IMG]

[IMG]local://upfiles/12092/74B4A7F186B84304B980B70495F7D162.jpg[/IMG]

[IMG]local://upfiles/12092/84EB23C5CFDE486482F03926668E5FD0.jpg[/IMG]

 

opps missed one

[IMG]local://upfiles/12092/1945D4DE74A143D580AC473C8710394E.jpg[/IMG]

 

Dave what does the coilpack have to do with the coolant ?

 

the coolant header has to be removed to get at the last coil pack and spark plug I thought that was obvious

 

Thanks for the help, bad coil.