87 with 2.9 TPS testing

[Friendly_RangerMan]

I have an 87 Ranger, 2.9 4WD manual. I’m having issues with the engine, it likes to bog down and lose power at random times. Sometimes it will die when I pull up to stop signs. I read a lot of pages on TRS and that pointed me to the throttle position sensor…so I tested it, and I think I’m getting funky readings on the ground wire? It reads 60 or 70 mv. is the sensor bad or is it something with the computer?

Thanks,

 

[franklin2]

From the TPS ground to the vehicle ground you are getting voltage? Those grounds are different.

Do you have any codes for the TPS sensor in the computer?

 

[Friendly_RangerMan]

From the TPS ground to the vehicle ground you are getting voltage? Those grounds are different.

Do you have any codes for the TPS sensor in the computer?

Yes, I got a code 63 which is low voltage in the TPS circuit I think…I get voltage when I probe the negative terminal on the battery and the ground (black) wire on the TPS.