TPS settings with Scanmaster and DS

[buickboy]

I set my TPS today at .46 and the WOT volts went to 4.56. When i started the car and switched the scanmaster back to TPS it read .50 at idle. Why the change? I noticed this happening on buddies cars as well. Directscan also read higher with motor running than when set static.
Mitch

 

[Black1986Beast]

Maybe because the car wasn't totally warmed up yet??
When you checked the voltage was it right when you started it, or a few minutes after?

 

[Steve Wood]

The voltage with the engine running is normally two tenths higher than with the engine off.

Set the idle tps with the engine off at .40-.42 and leave yourself plenty of room.

 

[salvageV6]

Alternator voltage vs. battery voltage, the TPS is a ratiometric sensor.

Do what Steve tells ya.

 

[WarpSpeed]

ratiometric - Is that a real word?

 

[salvageV6]

Yuppers!

My boss uses it all the time to describe our sensor design at work.

TPS is an example of one too.