Ok so i just dropped in a lt1 from a 94 corvette into my 96 z28. i didnt hook up the exaust yet and i turned it on. it turned right on. then later i turned it on again and i let it run for a while and after about 1 min. the rpms starting going down and i had it at wot and it was still going down and eventually it died. It did this a couple times. now, when i turn it on, it doesnt really do that, it idles at about 450- 500 rpms and it sputters frequently and while pressing the gas it has trouble going up in rpms. On top of that it overheats even while the fans are on. i know that the 94 did not have a crank position sensor but the 96 did. So im thinking its a computer problem? i thought it could also be that not enough fuel was getting to the engine...its ran about 15-20 minutes total since i dropped it in..so i though it should be getting enough fuel by now..so what do u guys think it is? oh and the engine only has about 59k.

 

Yes the 96s had the crank position sensor. Remember that 94 is OBD1 and 96 OBD2

 

check the pressure and scan it for codes. Hook up the exhaust, it's really a bad idea to run an new engine setup while it's so loud you can't hear anything going wrong.

 

Yeah..so do you think its the pcm thats doing this?

 

Oh ok...and yeah haha its really loud!

 

Have it scanned for codes and put the exhaust on it first.

 

Ok yeah ill do that...but sometimes the service engine light is on and then it would go off...

 

The PCM will store the codes so you can retrieve them later. You can pull them at any time.

 

Oh okay thank you