My recently purchased 95 trans am has a fresh rebuild with exactly 625 miles on it it has a cai long tube header 3 in exhaust flowmaster and 292 comp cam. the problem im having is when i first start the car it runs great for about the first 10 or so miles and then it starts cutting back,spitting,sputtering,popping through the exhaust it acts like its running out of gas or losing fire or somthing. after about a couple of miles of this it stops and does ok after i get it home and it sits a while it will start up and run fine for another 10 miles. fuel pressure is at 42psi when priming and doesent bleed away and its between 37 and 42 running could i be over cammed on this stock as far as i know engine any and all advise would be wonderfull

 

Is it throwing any codes before, during or after it's temper tantrum?

 

was there a tune done for the cam ?

 

bad opti?

wires arching