I need some advice/guidance on checking and adjusting the TPS on a engine that I’m working on. I’ve searched and cannot find clear answers anywhere.
I have an engine sitting on a stand and would like to ensure that the TPS on the throttle body that I have installed (not the engine’s original throttle body) is set correctly. Am I supposed to measure the voltage at the TPS itself or the wiring harness that is supposed to be connected to it? Most of the internet articles that I have come across aren’t totally clear on how to do this. My point being is if the engine is on a stand, not installed, how does this work if I am supposed to check the voltage at the wiring harness (as suggested by everything that I’ve read so far)?
That part I understand, but the motor is sitting on stand, if I take the measurement at the TPS, how do I get voltage to it then? Everything that I’ve read so far keeps saying to measure at the harness which is in the car. The engine is not - it’s out of the car, on a stand.
I’m pretty sure this is something you do while its in the car. When I did mine my car was running and I just connected the probes of the multimeter directly to the TPS spade connectors. Then from there you adjust it into spec.
there is reference voltage sent to the tps. I believe its 5volts. Unless you were able to hook something up to send 5 volts to it you can’t check it out of the car using the standard method.
but it does act as a resistor, so you could check the change in resistance as you turn the throttle plate. But I don’t know what ohm spec you’d be looking for… the main thing is to check and see if it changes evenly as you open it, without any dead spots.