How to tell the difference between a 90 and 91 ecu

[whiteythepimp]

Long story short I bought this car (a 90 gst) and it has a 91 talon tsi awd ecu non eprom.. Looking to go eprom.. Need to find out if maybe just the casings were swapped or the whole ecu.. I know at some point the car was stolen.. The ignition column, ignition tumbler have a diff key then the car, typically pry marks on the door.. Salvaged title.. So is there a way to actually check to see if its a 91 ecu or??.. I have the ecu out and open in front of me.. Have the whole stereo part pulled for easy access to wires... HELP PLEASE!!

 

[Talesin]

Easiest way would be to look at your wiring harness. There's a pinout up on VFAQ for the 1Gs, the only difference between 90-91 on that front is that two wires are swapped. Can probably look and figure out if they were switched, or if it's more likely to be the casing. I believe that there are silkscreening differences, but you'd need to read through the advanced sections, specifically the EPROM tuning forum.

I really have to ask though... did you get the car for free? A stolen salvage title car would make me more than a bit leery.

 

[whiteythepimp]

1000 bucks with a hog ported head with all titanium goodies, comp cam's, skunkworkz sprockets apr head studs, gsx trim package.. Only problems is the sun roof leaks and by the time I got it home the head gasket blew.. (figured out they didnt torque it enough).. Long story short, I ordered about 5,000 worth of shit for her.. Only thing left is the eprom since my dsmlink will be here in about a week... And hense my little dilemma.. And I called motoguys garage, gave them a bunch numbers.. They asked me if it was the original ecu.. I told um it looked like a junk yard cause it had 91 talon written with a bunch codes (junk yard ones obviously) and he said it was from an awd tsi.. Long story short i still have all the 1g coils and all the other stuff so I dunno what to believe.. Hense my thread about it ...

 

[rass1313]

KEYDIVER Chips -1991+ ECU in a 1990 DSM

converting a 1990 to a 1991-1994 ecu system