hi, recently bought a 1992 z28 camaro. previous owner swapped the 305tpi with a 350tpi. he used all the same wiring for the swap. do the 305, 350 have the same type of computer? or would i need to switch it out? just starting out on the car thing, so dont know very much at this time. thanks for your time.

 

Uses the same ECM except for the prom and he may have changed that. How dose it run???

 

it runs very rough when first started. have to let it warm up awhile before i shift into drive or it just clonks out. when i do get going its seems very hesitant, then after about 15 minutes it usually runs great then. replaced fuel pump, sending unit. not sure if it could of been the computer, or maybe it needs a new ignition.

 

as stated above, same computer, different prom(chip), if you want to verify its the right chip, unscrew the cover on the ECM, there should be a sticker on the chip that has 4 letters on it, find out what that says and it will tell you if you need to swap the chip