generallee440

i have a 91 gt. i am trying to set the tps voltage after rebuilding my motor. i know how to set it, but when i try to do so the voltage jumps up and down with out moving the sensor. it moves between 1 and 3 volts with out moving it. the car will start but will only run above 1500 rpms and dies when you take your foot off the pedal. it has me stumped

mjr46

make sure your test leads are making good contact to get an accurate reading, if they are and prob still exists the sensor may be on the fritz......

generallee440

the senor only 3 months old and it was ok when i put it on. then my motor blew up and it be sitiing or 2 months and now it not right. and i have good contact with the wires.

mattdel

if you're hitting 3 volts at idle, the sensor is toast.

mjr46

doesn't matter how old it is

Bubba 95SN

Sometimes the only good thing about a new part is the box. Bubba

generallee440

so i bought a new tps for my 91 gt to day. i put it on the car and now it has 4.91 volts with the key on not runing .

dreamer1uk

Which wires are you probing?

You should be probing the GND and SGN RTN. Idle, the TPS should be at around 0.98v and WOT should be around 4.9v.

generallee440

i am testing the green wire . it is at 4.91 and and the red wire is at 5.1 . tested it to make sure it was geting the right voltage