Thread: TPS Voltage?

Kind of weird.
Voltage going to TPS is 7.6V......... Should be 5V, correct?
OBD1 Nistune ECU - Z32 MAF - P11 with step-down harness -

That's not good. How are you measuring it? Should be .45 to .50 throttle closed, and ~5v WOT.

C

Are you measuring the voltage going to the TPS or the voltage that the TPS is outputting? As mentioned above you should see .45 to .5 volt with throttle closed, and 5v with the throttle all the way open or WOT.

And voltage to the TPS plug with the TPS disconnected should be +5v (on the power wire). Certainly not anything like +7.6v.

When I measured the 7.6V, it's to the bottom wire with the TPS which is the supposed to be the voltage sent from the ECU. I can unplug it and check it this evening.
The signal wire voltage is at 1.15V and doesn't change when the throttle is opened.
I have another TPS on the way, but can't figure out why I have 7.6 volts.

I am not able to get the car to start.

Here is the situation. I bought the car about 1 month ago. '99 P11 with W10 DET GT2871R - Z32 - STI 520 Injectors - NISTune OBD1 ECU with step-down harness - 6-Speed - Nismo FPR

The car runs okay, but not like it should. Always felt the timing was a little retarded. Car only getting about 27-28 MPG.
Adjusted the fuel pressure down to about 42PSI. Drove the car around the block, got into the boost a little and it fell on it face, like it blew the spark out or something.
Tried to put the car into timing mode so I could check the timing, connector was jacked-up on the TPS, couldn't get it to lock/clip back on. Went to pick and pull and installed another connector. Got the connector on and couldn't get the car restarted. Installed new plugs and it fired right up. Took it around the block and was spitting and sputtering. Tried to check the TPS and saw the 7.6V.... can't get it restarted, it tries but doesn't start.

I will check this when I get home in a couple of hours. I guess my question is, if it is 7.6V. Is it an ECU issue?

Check the ecu and make sure it didn't short itself out

Sounds like an ECU issue, yes.

I guess I'll know when I get home then........?