no voltage at tps

[greeneyegi]

i just wired up my fuel transducer,i used the 5v on the tps,wich im also using for my map sensor,wired signal to the powerlogger and i started car it idles real high.it gave a code22,i tested the voltage to the tps and nothing.where does the voltage to the tps come from

 

[GNVenom]

The 5 volt source comes from the ECM. If you have a short at the TPS connector, you run the risk of destroying the voltage regulator in the computer - which will affect the other circuits in it as well.

Remember, the MAP sensor is pinned: A - GROUND, B - Signal, C - POS 5V

While the TPS sensor is pinned: A - POS 5V, B - Signal, C - GROUND (assuming it's the 86-87 TPS, the hot air TPS, A and C are reversed)

If you should use the 5V source on the wrong pin of the MAP sensor, you'll take the voltage down, and probably fry the MAP sensor.

 

[greeneyegi]

don't ever use black for a pos wire on a dc system,ihad the pos grounded,i got lucky this time.thanks for the reply,