8/90 Ecu!

[kwaliph]

I have a 91 GS-T and so I bought a chip for my ECU. So i removed the ECU and opened it up to see no place to solder the EPROM craddle. Sure enough, my doorjam reveals it's an 8/90 production year .

My question is; Is it possible to swap an ECU from an earlier PY (I.E. Say a 2/90 or any other 90 equiped with an EPROM) instead of replacing the ECU from a 91+ GS-T along with the other headaches required (I.E. Coil Pack, Coil Transistor, Tach or Instrument Cluster)?

 

[steve]

Have you checked the car to see what type of power transistor module you currently have?
You car was made in 8/90 but it should still be a '91 model year car with the '91 coil pack and PTM. If that's true and nobody swapped a '90 engine into the car it should use a '91+ ECU.

What was the part number from the ECU you pulled?

Steve

 

[kwaliph]

HOORAY!!! Your were right Steve. I didn't checkup on the ECU number but i do have the triangular coilpack harness (91+) . For any reason, here's the ECU number currently in the car: MD166260

Turns out it was changed about 6 months ago due to ECU failure (leaky capacitors).

The only thing that stumped me is, I thought it was neccessary to swap the coilpack and transistorpack because they use 2 different tach signals, how is my tach able to operate with a 90 ECU?

 

[steve]

HOORAY!!! Your were right Steve. I didn't checkup on the ECU number but i do have the triangular coilpack harness (91+) . For any reason, here's the ECU number currently in the car: MD166260

The only thing that stumped me is, I thought it was neccessary to swap the coilpack and transistorpack because they use 2 different tach signals, how is my tach able to operate with a 90 ECU?

That's a 91-92 FWD ECU for a Federal turbo car built between 6/1990 and 6/1992. Exactly what I would expect to find in your car along with the 91+ coils, PTM, tach and the rest of the stuff they used on the '91 model year cars.

Steve