I just recently had a used motor with 55k put into my '92 stealth r/t TT... Everything was running fine until i noticed when i would go full throttle past 3000 R.P.M's in any gear the car will hesitate real bad, as almost as if the car wasn't warmed up...(obviously ive let it warm up before i've tried it...) now the funny thing is i have driven it twice where it didint do that...but now since then its just been lagging real bad... any help please, im trying to take the car down to the track before i leave for school on aug. 12th!...

 

Did you check your throttle positioning sensor? That could be a problem....

 

I took it to have it dyno'ed and then have them troubleshoot it...now i am taking it to the dealership so have the MAF sensor checked..