Asphalt_MadMan

So, I'm a new member, and this is my first time posting on AudiWorld. I've searched the threads and couldn't find much with my situation. I have a 2001.5 Audi s4 and only has upgraded down pipes, intake and diverter valves. No tuning done. I keep getting the p304 code for cylinder 4 misfire. I've switched the coil pack around to another cylinder and cleared the code and still #4, replaced the spark and cleared code and still the same. switched the ICM's around and still the same. even bought a new ICM just for hopes and wishes but still #4. and even switched around again after new ICM was purchased. I'm stuck and don't know what else to look for. plugs are gapped .028-.030. Thanks for your help.

Asphalt_MadMan

No Body Able to help? I'm going on vacation and driving over 2000 miles in a couple weeks and only ride is my S4. I really don't want to drive it with a miss fire. I also get a multiple misfire code now. The sparkplugs aren't that old. I replaced them 5 months ago with factory NGK plugs.

Mike9999

I have a 2008 with the same problem. Can't find any real answers. Going in to the dealers this week. Was hoping I can take some info with me when I go in so they don't try and bs me.

drd

sounds like a wire is bad. youre gonna have to check make sure the input to the icm is good and if that is then you know the problem is between the icm and the coilpack.

Asphalt_MadMan

Well I found out my problem, a lifter caved in and started rounding the tip of my exhaust cam and so in which was also causing a misfire