I'm a little embarrassed to admit this but tonight on the way home, I was tempted by a long stretch of empty highway in front of me and hit the gas in my '99 T5. Before I knew it, I hit 110 mph and felt the fuel cutoff kick in. At the same instant, my CEL started flashing, then went solid, and it was clear I was missing a cylinder.

Pulled over, and showed P302 I think, code for #2 misfire. Limped home, swapped in a new coil, and erased code. Started the car, and it still runs with a misfire. Reading back the codes again shows a pending P302 and now a P1171 "Long Term Fuel Trim (Upper Limit).

I've read about 1171 being the MAF, but I'm wondering if I've messed something up by hitting the governor and cutting off the fuel. I'm also lost as to why the car would continue to misfire with a new coil.

I'm trying to determine what my next steps should be. Can I disconnect the battery and force the computer to relearn fuel curves?

I don't want to think about burned valves, although a compression check has crossed my mind. I'm hoping the P1171 code indicates something beyond just a dead cylinder; something easy.

Any advice as to what's next?