Ok, like the other posts said, I have swapped in Thorley headers, replaced the fuel pump, sock, filter, plugs, O2 sensor, PCV and it runs like a champ while its cold. Soon as it warms up **poof**.... No power, hesitates, stumbles, causes the tranny to not shift right. etc etc etc..... Ideas? So if the ECM uses the Coolant sensor and the TPS while its cold then goes to the O2 sensor when hot, does this not point to the O2? But its brand new. So there in lies a few other options, MAP, EGR, TPS.....Where should I start next? Looks like all these sensors are about $65 so I'd like to get the right one in at least the 1st 2 or 3 tries if not the first.