i have a 95 camaro with an engine out of a 94 both are z28s engine ran good so i swapped it in this car and now when it gets warmed up and i drive it i get a few blocks and the idle drops low and it tries to stall and if i hit the gas it sputters til around2500 rpms then it hit in strong i switched mass air sensor,iac,tps,coil,fuel rail and injectors,checked fuel pump,idk what else to do car has hooker long tube headers and bbk throttle body,also check engine light comes on with fans but i heard that is a seperate problem,when fans are off car idle still drops low and doesnt seem to trip ses light

 

Disconnect one of the O2s and see if the problem is nearly eliminated.

 

First question would be did the car ever run good after you installed the motor into the other body.

 

motor ran good in other car but no it hasnt ran right since i switched them and im positive everything is hooked up right both i and another mechanic double checked off of his car