Did some testing the other day...noticed under WOT the TPS sensor reads 3.8v in my logs, we visibly looked at the throttle body and it appeared WOT. We then turned off the car, but stayed connected, ignition on. We by hand opened the throttle body and it went to EXACTLY 5.0 volts when it was wide open in the scanner.
How is this possible? Is there some scalar only applied to the channel when the vehicle is actually running? Or is it that from 3.8v to 5.0volts it isn't actually visible?
This goes to the same issue I have always had that the standard TPS% channel in the scanner never goes over 87-88% since it assumes 5.0volts is WOT when in reality it is 3.8volts....or is it?