i searched and found what i wanted a couple days ago, but now i can't find it again. According to the book its about .59volts at idle postion and what i remember from here it's 5.5 volts at wot.

hooking up to the B+C wires got 4.4 volts at idle and it dropped as i increased the throttle

with one lead on the middle wire and other at ground i got .59 at idle, but i got 4.8 i think at wot, and at around 3 volts i would hit a dead spot. Anywhere between 2.8 to 3.1 the multimeter wouldn't read anything. I moved the throttle real slow, but i couldn't find the exact spot.

Anyway if anyone can tell me what the wot volts are or if it sounds like it's bad i'd appreciate it. I'm gonna check on the price for one tomorrow.

 

Spec is 0.55 volts at idle, +/- 0.05 volts, WOT at 4.50 volts. But good luck getting 4.5 volts for the WOT measurement; I found it impossible unless I threw the idle adjustment out of spec.

The PROM burner guys say that the computer goes into PE (power enrichment) mode at a certain percentage over idle voltage. Supposedly as long as you make the "4 volts" mark for WOT, the computer's good to go.

Sounds like you need to hook between the A&B instead of B&C...

To check the swing of the TPS, you'll need an analog meter, and you won't be hooking the meter up to the computer. You would unhook the TPS from the wiring harness, and hook the analog meter up to the TPS directly (no jumper wires going to the wire harness). Put the analog meter on resistance, and measure between the TPS's middle terminal and either of the other two terminals. As you move the throttle, resistance should either increase or decrease (depending on which terminal, A or C) smoothly, no jerks or jumps.

The sampling rate of digital meters is what makes a reading look "jumpy" on them... analog meters are instantaneous- but the current draw is too much to use for computer circuitry.

 

hey tom, what do you use to jumper the wires from the harness to the sensor so you can check the voltage? just loose speaker wire type stuff?

its too bad i couldnt make it so i can test the thing from the harness without taking it apart.

or i could cut the rubber off the wires in one spot and tape it when im done?

 

I cheated. I sold it but i had the moates.net USB cable and i just hooked it up to my laptop and set it to 0%. Did that to my car and my friends IROC

 

That is right, Tom, the service manual says 0.54 +- 0.55 volts with the engine in ignition on only....I do not remember what the max volt is, but it is around the 5 V......85berlinetta2.8 you can check the volt by using a large needle wire, there is no need to pich a wire or something more difficult than that....I use a needle of 2 inches that came with the voltimeter, no problems at all. do not check the TPS volt when the car is idling since it will show you wrong voltage.