I have a 91 Z28 5.0 Automatic TPI, and I am in need of a ECM. Will any other year models work with my car? I have found some on ebay that state will work on beretta, camaros and firebirds. Will these work? Any help would be appreciated. Thanks.

Many other vehicles used the same ECM as your car: the 1227730

Which is also known as these:

16198262
16196344
88999196

(newer Service Number for the same ECM).

However, the MEMCAL (see sticky above) will be different. The MEMCAL holds the calibration for the engine/vehicle. So your MEMCAL will need to be used with the other ECM.

And don't let them sell you an ECM as a 'Camaro TPI' ECM. That'll just let them charge more for it. Besides, most of the time this is done the ECM is from a 6 banger anyway. Here are some vehicles that use it:

86-94 Celebrity, Corsica/Beretta, F-Body
Pont 6000 87-91 6cyl
88 2.0 4cyl
Corsica 87-93 6cyl
Cavalier 88-93 6cyl
Tempest 88-93 6cyl
Firebird Camaro 90-92 6cyl, 90-92 V8

RBob.

The way it looks, I night only need a memcal if anyone has one they would like to sell.