been getting an intermittant high idle which goes if I stop and start the car, so I thought about checking the TPS voltage through my AVC-R.

 

When idling properly (around 750rpm) it show .44V, checked it ealrier when it was mucking about abit and it was nearer 0.47V.\

 

Question, should the TPS by constant while idling, or would it fluctuate with rpm if something else is causing it?

 

Just checking before I go scrub the connectors, as I have a feeling TPS should be constant if foot is off the Loud peddle.

 

Cheers guys.

 

PS full poly bush set arrived today so if anyone wants new tesion rod bushes let me know as I'll have a set spare.

TPS voltage is directly proportional to throttle openning, so it should stay the same as long as you're not touching the throttle.

If it fluctuates then it may be down to a poor connection, or the rheostat/potentiometer in the TPS itself is wearing out.

Sometimes it can fluctuate if it's right on the line between say .44 and .45, however you want it so it's pretty staionary as above .46 will change the idle speed to about 900rpm.

had a feeling that was the case! It wasn't mis-beahaving to badly earlier about 1000rpm with no air-con. Might leave cleaning the connectors and catch the voltage next time it decides to idle at 1500rpm just to make sure.