1990 ecu paired w/ a 1986.5-1989 engine
 

Any complications with this? found out the engine in my 1990 supra is from a pre 90 and i know 90 was when supra changed alota stuff...

Mainly refering to the TPS does the 89 and 90 have the same resistances? becuase they TPS are of diffrent designs.

I have no idea.
I put a 90 wire harness and ecu into an 88 car, but I think I used most of the 90 sensors.

It won't work right the ecu's are engine coded.

From what I understand anyway.

Find out what year engine you have.

Thats the ecu you need.

well if that is the case erm my ECU only throws a code with one componant, the TPS which is pretty busted up, and currently replacing it. I cant seem to find info on pre 90 resistances for the TPS, i mean if resistances are the same then......

One thing i noticed was MKIII Supra Graveyard has the 7mgte auto ecu/ect all grouped together.

Why i bring this up is my TPS part number is for a 86.5-89... and the 90 sensor doesnt fit the same, the plastic bit on the inside is verticle instead of horizontal if i remember right.

I guess ill just install it and see if engine code goes away if not you think just a throttle body from a 90 and the 90 tps will fix the problem ? lol

Did some looking around on the parts catalogue.... aparntly all the throttle body are the same... so kind of confused as to why one sensor has a verticle plastic peice and the other a horizontal one

And all the TPS are the same lol..... i guess they just sent me the wrong one... ahh well

good to know i have nothing to worry about and another reason i have to not trust the toyota dealer in sumter sc...... guy even asked for my vin number to make sure it was the right part

know of a way to check to year on my engine just so i know for sure?

How is your car now?? I didn't know that.... The ecu is grouped together???

I had actually just run into the same problem with the TPS... I got one of the newer sensors (with the metal exterior as opposed to plastic) from a local pick a part (fits in the pocket, so you can't beat that price). Got home and found out that the interior's of the sensor were different. After thorough inspection and a little reading, found out resistances are the same for all the TPS's, just design difference. So I went and picked up a newer TB to go with my sensor (as I couldn't find an older sensor), calibrated it and installed it on my engine, and *VOILA* TPS CEL goes away.

the old on i have seems more sturdy, the interior parts are metal where as the newer ones 89+ are plastic on the inside.

I might have had the age mixed up on the one's I was describing... Either way, metal is better. My plastic one's interiors melted (maybe when I overheated and blew my first motor). I don't see that happening with the metal parts in the TPS.

I have had no compatablility problems with running a 90 ecu on a pre 89 engine.

Seems like yeah maybe diffrent parts but they all send they same signals to the ecu