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Rough Idle
I've noticed over the last few weeks that the idle of my 2004 GTO isn't as smooth as it used to be. Seems to run great otherwise.
I've got 35k miles now and had the fuel system serviced by the dealer at 30k.
Replaced the stock air filter with a K&N at 15k miles.
Does anyone think changing the spark plugs might be a good remedy?
Any recommendations for replacement plug part?
How hard are the plugs replacement in this car?
Other things that might cause rough idleing?
Thanks,
JohnC
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