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1990 2.5L tps question.


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Hello, was just wondering if the 1990 2.5L tps is the same as one from a 4.0L?

 

Buddy of mine has a 2.5L that is revving up and down at part throttle.

Figuring to see what can be done cheaply - as in if I have any parts that will work for him?

What causes should I look at? 1990 2.5L 5spd (looks to run the Renix system) .... Could a Bad IAC be another possible culprit? O2 sensor?

He's put a new fuel pump in a few months back already.

 

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Hello, was just wondering if the 1990 2.5L tps is the same as one from a 4.0L?

 

The 2.5 and 4.0 TPS have different part numbers, so probably not interchangeable. Also the manual and auto tranny models use different TPS's for each.

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The 2.5L lists as a Standard Th31... I'm thinking it may mean that it uses an unmodified GM part... Does anyone have the TPS wiring pinout for a 1990 2.5L to confirm?

The 4.0L used a TH32 with a modified pinout specific to Renix. By re arranging the wires I have modified my own 4.0 to use the GM part instead of the AMC variation.

I would like to confirm the 2.5's needs if possible.

 

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