LT1-LT4 Modifications 1993-97 Gen II Small Block V8

TPS help

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Old Sep 10, 2021 | 01:20 PM
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Default TPS help

A few months ago I changed my tps and everything was fine, well recently the low res code came back after I got the trans swapped on the car. Now the car won't shift until its get very high rpms which i read online could be due to the tps being bad so I replaced it, and nothing is fixed. The old tps would read correctly when the car was in the on position and when i started the engine the reading was all over the place, the new tps only reads 0% or 25%. I've checked connection and its getting 5 volts, checked continuity to pcm from the tps and its also good, I redid the harness months ago and rechecked it and its still in one piece. I'm completely stumped
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Old Sep 10, 2021 | 03:18 PM
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I once went through 3 bad TPS sensors on the same car in 1 week. Where did you source the sensor? I would look for Delphi or AC/Delco

You should be able to check the TPS with a decent multimeter.. if you can find the specs for the various point to point measurements for eh one you have.
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Old Sep 10, 2021 | 05:35 PM
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Originally Posted by pdxmotorhead
I once went through 3 bad TPS sensors on the same car in 1 week. Where did you source the sensor? I would look for Delphi or AC/Delco

You should be able to check the TPS with a decent multimeter.. if you can find the specs for the various point to point measurements for eh one you have.
Its a AC Delco from Oriellys, i had to order it online, the guy went and got it and came back and threw it on the counter and all I could think was "f**k me dude i need that in 1 piece
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Old Sep 10, 2021 | 08:14 PM
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I also checked voltage coming out of tps using a multimeter and it was measured in mV so I know the correct voltage is not coming out of the TPS which leads me to believe its faulty.
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