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1993 Pontiac Sunbird Repair Question


Topics covered: Abs, Fuel injector, Sensor.
Mileage: 248,000 miles.

Asked on November 26, 2011

Throttle position sensor output voltage

Replied on November 30, 2011

White? There is no white wire. There is a gray wire and that is the wrong one. You should have the black lead on the black wire and the red lead on the blue wire.

Tiny Answered by Wrenchtech (expert)
14,708 answers provided
Replied on November 30, 2011

ok i tested on the wires as you said and get a reading within spec but when i check for dtcs i am still getting one for the tp sensor what else could cause that

Tiny Response from bmxwayne
10 questions asked
Replied on November 30, 2011

Any of the related wiring or the PCM itself.

Tiny Answered by Wrenchtech (expert)
14,708 answers provided

Replied on November 30, 2011

i do know that i have a failing fuel injector i have a replacement for that on the way

Tiny Response from bmxwayne
10 questions asked
Replied on November 30, 2011

i replaced the pcm less than a year ago there must be a bad connection somewhere then

Tiny Response from bmxwayne
10 questions asked
Replied on November 30, 2011

Perform the same test on the same wires at the pcm and see if you get the same results.

Tiny Answered by Wrenchtech (expert)
14,708 answers provided

Replied on November 30, 2011

I have a funny feeling about the brain here-Wrench which was my next step on ur suggestion

Tiny Answered by rasmataz
68 questions asked
Replied on November 30, 2011

We'll find out when he finishes the test I just gave him.

Tiny Answered by Wrenchtech (expert)
14,708 answers provided
Replied on November 30, 2011

ok got the same reading at the pcm now what

Tiny Response from bmxwayne
10 questions asked
Replied on November 30, 2011

If you're absolutely sure that that code is resetting immediately, then you have a bad PCM. It would be better if you had a scanner to look at the TPS numbers that the PCM is seeing.

Tiny Answered by Wrenchtech (expert)
14,708 answers provided