Anyone here a C4 guy?

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Originally Posted by Inferno

Re-Reading your post, check the O2 sensors, sounds like your problem. The other things like A/C...no idea lol

Why would the code scanner not pick that up?

BTW, it seems to get worse when it gets hot. I let it cool a bit, and it restarts feeling much better.

It misfires so fucking bad that the cats start to smoke.