Anyone here a C4 guy?

[Particle Man]

Originally Posted by Avatard

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.

Something electrical is swelling with the heat and then contracting when it's cold. If it were older I'd swear it was the distributer cap (had a similar issue with an older car some years back). Check the electrics to feeding the spark plugs...