plan of attack for occasional rough idle
10-09-2007, 05:44 AM
#1
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plan of attack for occasional rough idle
Howdy, please be easy on a newbie.
My 99.5 A4 with the V6 has an occasional rough/stubling idle with these symptoms:
- almost always on cold start
- seems worse when humid/wet/raining
- has thrown a random misfire CEL twice over last month.
My search on this site points to spark plugs, plug wires, ICM, coil packs, maybe coolant temp sensor. BUT almost all of the postings I find are for the 1.8 turbo.
My question is, does the V6 have the same ICM issues as the 4 cyl? Would replacing plug wires be a reasonable next step? The problem is
intermittent enough that looking for spark jumps from the plug wires in the dark might be iffy. Also, I've not seen any of the other postings mention humidity as a factor. Would that suggest something else?
thanks
Jon
My 99.5 A4 with the V6 has an occasional rough/stubling idle with these symptoms:
- almost always on cold start
- seems worse when humid/wet/raining
- has thrown a random misfire CEL twice over last month.
My search on this site points to spark plugs, plug wires, ICM, coil packs, maybe coolant temp sensor. BUT almost all of the postings I find are for the 1.8 turbo.
My question is, does the V6 have the same ICM issues as the 4 cyl? Would replacing plug wires be a reasonable next step? The problem is
intermittent enough that looking for spark jumps from the plug wires in the dark might be iffy. Also, I've not seen any of the other postings mention humidity as a factor. Would that suggest something else?
thanks
Jon
10-09-2007, 06:20 AM
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Re: When is the last time you changed your plugs? Also, like Nate said, clean the TB.
Plugs just changed, seemed to make a minor improvement, will clean TB next, thanks.
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