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-   -   1990 ecu paired w/ a 1986.5-1989 engine (http://www.toyota-supra.info/forums/mkiii-supra/10653-1990-ecu-paired-w-a-1986-5-1989-engine.html)

mkiiisupra 01-29-2008 12:40 AM

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.

Pretaco 01-29-2008 05:54 AM

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.

supramacist 01-29-2008 06:04 AM

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.

mkiiisupra 01-29-2008 06:13 AM

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

mkiiisupra 01-29-2008 06:36 AM

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?

kerpal 02-29-2008 08:21 AM

Quote:

Originally Posted by mkiiisupra (Post 54731)
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 02-29-2008 09:15 AM

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 02-29-2008 01:59 PM

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 03-02-2008 06:19 AM

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 03-02-2008 12:13 PM

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 03-06-2008 02:08 AM

Quote:

Originally Posted by btwilson86 (Post 55622)
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..

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