2002 Audi A4 rough idle at start up
#4
sparkplugs, fuel injectors, coil packs, coil pack harness. if you are getting a misfire code for a particular cylinder, maybe shuffle the parts i mentioned to see if the misfire occurs on a different cylinder. if it does, you'll know what to replace.
#5
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I check the codes out I had misfire on one and two and number one was running lean it needed a tuneup anyway so I replaced all for coil packs and spark plugs it starts up smooth now Had check engine light removed and it has not given me any problems Since . Thanks for the help