1990 ecu paired w/ a 1986.5-1989 engine

[kerpal]

Originally Posted by mkiiisupra

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 auto body part from a 90 and the 90 tps will fix the problem ? lol

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

[btwilson86]

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.

[mkiiisupra]

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

[btwilson86]

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.

[mkiiisupra]

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

[kerpal]

Originally Posted by btwilson86

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 an auto body 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.

Its as simple as that??? Wow, thats great!!! I''ll copy this message so that I'll know what to do when I encounter such problems..