How to check TPS voltage?
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Member
Joined: Jun 2001
Posts: 296
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From: Hurlburt Field, Florida
Car: 1991 Z-28
Engine: 350 SBC
Transmission: Probuilt 700R-4
How to check TPS voltage?
I have a 91 z-28 with a TPI. How do you actually go about checking the TPS voltage? thanx guys, and gals.
Supreme Member
Joined: Aug 2001
Posts: 1,896
Likes: 1
From: Warrington, PA USA
Car: "02 z-28
Engine: LS-1
Transmission: 4L60E
The TPS has 3 wires. Use a decent multimeter and probe the CENTER wire with the positive meter lead and the ground lead of the meter to a good chassis ground. I use a straightened paper clip to get through the rubber insulator to make contact with that center TPS lead. TPS must be plugged in as normal, it should read approx .55 volts. Some of the later ECM were self setting meaning no adjustment was needed but I am not sure what year that started.
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