I have a theroy. Does anyone know if a failing TPS could be at fault? I swapped one over in the summer from Chongo's mobile duratec store. It was said to be failing when he took it off his car but we were in a pinch since we toasted my OEM one. So I got to thinking that if it truely were failing and the TPS was giving a false reading to the computer. Thus the computer sending in more fuel then the there is air to mix with it making the car run rich in the lower RPM's till the secondaries open up. Now when they open the car goes faster then it ever has before the modding. Now I would assume that this could explain a lack of low end torque that my car definately is experincing. Does this make sense to anyone and is it even a possibilty. I'm thinking that it is possible to have a sensor show as out of wack on the OBDII but the OBDI not be able to detect it given its primative programing. At least at this point I'm really hoping that to be true.