T88Rx7

check out my problem. i was checking via PFC that my TPS full range sensor (VTA1)voltage is always higher then the narrow range (VTA2) voltage. example: when i adjust my TPS narrow range sensor (VTA2) to 0.75volt at closed throttle, i get 1.45volts at full range sensor (VTA1).

The full range (VTA1) voltage is supposed to be lower then the narrow Range (VTA2) voltage right?

P.S. my WOT voltage reads perfect VTA1 full range shows 4.48 volts, and VTA2 narrow range shows 4.98 volts at WOT.. any idea guys?

P.S.S. I did this with the car completely cold would it make a diffrence since i eliminated the wax rod fast idle cold start crap

cewrx7r1

iTrader: (2)

Q1: I did this with the car completely cold, would it make a diffrence since i eliminated the wax rod fast idle cold start crap?
A1: A normally operating hot wax rod and fast idle cam would open the throttle more when cold then release it when the engine is fully warm. That is NSOP and what you want and expect to happen. And when the throttle is opened more, both TPS voltages should increase.

Since this is not happening, your throttle position is the same cold or hot.
The manual says to do it hot. But in your case cold is the same as hot.

T88Rx7

so then my reading is way off on the voltage on the tps cold or hot? since i can only get one of the ranges at the right voltage and not the other, u think my TPS is bad. you see if i get the narrow range voltage in spec the full range voltage is out of wack. or could i be adjustin it wrong. i have all the adjustment screws all the way out. what you think?

T88Rx7

I even took the tps off and plugged it up to the harness and tried to adjust it to specs manually threw the back of the TPS where the shaft goes in threw. while checking the pfc VTA1 and VTA2 i cant get both of them into specs. While i try to set VTA1 or VTA2 into specs one or the other falls out of specs, its not like we can set them both separately...lol i wish...lol.

do you think it can be a bad ground or something, or is it possible that the TPS can go bad like that?

T88Rx7

ok i found the situation with the TPS, i cut it open and i was rusted like crazy inside, so i took it aparts cleaned its and solder it. put the TPS back in and bam... its right on the money... happy *** hell i am.

now i reset the pfc and let it go threw its learning process and it is surging still. Someone told me it was because the motor is ported? i thought i seen a few guys with stock injector ported motor and pfc running fine with stock PFC maps?