I replaced a TPS and now my van won't downshift
My van was running very rough and the check engine light came on. Went to auto zone and the error was for the throttle position sensor. I replaced it and my van does run smoother but it won't downshift for passing and it dies when I drive in reverse.
I know you replaced the TPS. to see if it is working correct you will need a volt meter to test it. With the ignition on, check the voltage on the TPS. It will vary as you move it. The voltage should increase or decrease in a smooth line. If it does not move smoothly you the TPS you have may be defective. I don't know what the volts should be you will need to refer to the shop manual for the correct voltage readings for your specific vehicle.
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