today i went to check and adjust my tps and the volts read .93. i adjusted it to .99 with the key in the on position. my question is what happins to the engine with the tps set lower then it should? less gas or what?
Below 1V the computer reads as closed throttle, while 1V and up it is reading this as part throttle. So if it is set too low, you push the gas partly open but the computer thinks it's still closed, as well as when you punch it the computer has less time to react. If you are really set low, your computer won't read WOT when it is becuasee it won't make it that far. I noticed that idle quality and throttle responce is definatly effected.
Lots of myth and urban legend out there around this one. Since 88 the ecu resets a baseline for tps throttle closed voltage each time the car is started. It doesn't matter where it's set as long as it's somewhere between about .7V and 1.3V. Anywhere in there is fine. There is absolutely no benefit to resetting it to "as close to 1V as you can get it" - where ever you set it with in the range described above is only good until the next time the throttle is closed - and it baselines all over again.