Got a 99 GT with a aftermarket plenum and a bbk 75mm TB. i messed with the throttle stop screw to get the bind out when i first installed it. the TPS that came with the TB went bad, so i contacted bbk to make sure stock TPS would work for a replacement. Of corse it did, but ever seince i've had odd issues with throttle smoothness, fuel mileage, and (from how it smells) improper fuel delivery (rich and lean) before and at WOT. I got the volt meter out and started checkin stuff and here's what i got; Closed: Ref= 4.2 volts Sig=4.2 volts. As i open it: Sig drops down to .20 volts instead of goin up. So my question is, is it the TPS bad or PCM messed up. I don't usually get stuck, but im highly confused and could use some guidance. Thanks in advance!