i was wondering, i have a 1990 toyota supra non turbo, what year ecu's can i use? or does it have to be specifically for my year? plz help? thanks

I have heard different things about ECU's mostly about turbo's. For an N/A though you shouldnt have to worry about what year, however I would recommend not to go backwards though as with newer models comes newer technologies. You can use a newer ECU however. I Know some models have Some safety additions and then theirs TEMS as well. I'm not sure if that plays a factor but you should be able to use it regardless. Oh yeah make it sure it also fits your transmission type, thats important too.

k thanks!

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Originally posted by Supra88T_Knight:
I have heard different things about ECU's mostly about turbo's. For an N/A though you shouldnt have to worry about what year, however I would recommend not to go backwards though as with newer models comes newer technologies.

Nope. 86.5-88.5 are the same ECU, using yellow plugs. 89.5-92 are gray plug, and the wiring pins are different.

They are NOT interchangeable.

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You can use a newer ECU however. I Know some models have Some safety additions and then theirs TEMS as well.

So long as the ECU is '90-92, yes. TEMS has nothing to do with the ECU. It has it's own computer...

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I'm not sure if that plays a factor but you should be able to use it regardless. Oh yeah make it sure it also fits your transmission type, thats important too.

It only matters if he's automatic. If he's got a manual, it doesn't matter at all. Manual cars can use automatic ECU's and wiring harnesses, but not the other way around.

well i have a 1990 auto n/a, and the one i bought is a 89.5

Then it will work just fine.

Well I wasnt wrong. I just didnt know about the color coded wires..lol. As long as I didnt misdirect him Shaeff, becuase I wouldnt like that. Also the Tems I wasnt sure of, it did seem like its own component and independent from the ECU, just didnt know if it communcitated to the ECU at all. But hey I learn something new everyday! Who says you cant teach an old dog new tricks?

You were wrong about the N/A ECU's. They also differ by year.

In any case, you'll learn. Just keep reading!