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Re: tps or ecu?
Did you have 5v to the sensor? Did you buy a cheap part?(if so, return it and buy a good one) Check for a bad ground to the sensor by backprobing the ground on the connector and touching the other lead to the battery negative. Do this with the key in the on position and all connectors connected, you should have no voltage. If you do have any voltage across the wire, try cleaning all the grounds you can find.
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'04 Cavalier coupe M/T 2.2 Ecotec
Supercharged 14 PSI boost, charge air cooler, 42# injectors
Tuned with HP Tuners
Poly engine/trans/control arm bushings
Self built and self programmed progressive methanol injection system
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