Did the computers change at all between the 93 and 95.....im gettin a 93 lt1 but the donor car is missing the computer and i found a 95 z28 with a computer missin the motor. I plan on buying an aftermarket harness so im leaving it.

 

92 (Vette ) and 93 LT1 had a different computer to 94/95
The early ones had a removable chip like the TPI cars ; the later ones have the memory built in
Almost impossible to get a aftermarket harness for early style computer
Some small changes ; different plugs on coil /Optispark but no problems using later computer and aftermarket harness on early motor

 

but would the engine still plug n play all the same. my donor car is a 93 trans am, the computer donor is a 95 z28. and im buying the aftermarket harness cuz i dont plan on using the trans out of it.

 

It changed from an ECM in '93 to a PCM from '94 on (controlling both the engine and transmission).

What transmission will you be using? Why not use the '95?

If you're getting the '95 PCM, why not get the harness? (Assuming it's still with the car.)

 

If your buying an aftermarket harness, go with the latest pcm available... Which in your case is the 95.

 

Break downs for LT1s are:

92-93 SD TPI style ECM
94-95 OBDI PCM
96-97 OBDII PCM

Generally, swappers opt for the OBDI PCMs for the cheaper more common tuning software. If you've got the software, theres no major difference from OBDI to OBDII. The old SD ECMs are a major pain since they use the old chips that must be removed and reflashed with each change. Everything else is adjusted on the fly

Even better, 94-95 PCMs fit 94-97 harnesses directly, but the later PCMs cannot be used on the older harnesses from the addition of a few critical wires(older PCMs simply dont use those pins)

 

so i am able to buy the harness and pcm for the 94-95 lt1 and it will hook right up to the lt1 i got out of the 93 trans am. The harness and pcm in the car were gon already but i didnt want it cuz i plan on running a T5 with it.

 

Thats right

Depending on the year T5, the VSS connector may or may not fit. Splicing in a new one will solve the issue. Be careful with older VSS' as GM switched the wire functions with respect to color for no apparent reason. If you hook them up and the PCM registers no signal, try reversing them

 

teh t5 is came n my 91 firebird?