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How do i know its the tpsensor

Car idles uneven and when i floor the car it holds back.the motor has recently been overhauled.

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Could be a coil pack ,if it was a older car then i would suspect a dirty idle jet and a faulty excess fuel pump ,maybe even a vacumn diaphram in the advance unit on the distributor ,but then again iam so old i remember lots of old things ,sorry i cannot help in this case

Posted on Jul 16, 2013


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sounds like your clearnces are a little too tight, therefore when you are warming up the clearances are tightening,and the valve is staying slightly open

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If you pull the connector off your TPsensor, and with multimeter in ohms, touch it to 2 of the pins (not sure which 2 on yours but trial & error will tell you & won't hurt anything if your wrong.) Have someone either hold the probes for you, or push gas pedal slowly for you, ( can do it manually from under hood to.). As the throttle increases (opens) the reading on the meter will do the same, then back down slowly and meter reading will do the same. Run it from stop to wide open, slowly & steadily, and back the same way a few times & observe the meter reading. If the meter goes up & down at a steady reading and doesn't jump a bunch or flutter, then chances are your TP sensor is fine. A jump from one number to another or erratic readings, indicates a faulty TPsensor. (Potentiometer) If it has a sticky or bad spot in the TPsensor, it feeds wrong or no info to computer, thus car acts up.

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