Ford Windstar 96 3.8 RPM High

I have a Ford Windstar 96 3.8, I just changed the air control valve (new standard brand), but keeps the rpm above 2000 in parking or neutral, in dual or reverse they keep them at 1200 RMP, when stopping as the box is tied by the high rpm, there are no broken empty hoses Perforated and I change it, with the old valve stabilizes and works well for some days, then the rpm begins to vary and turns off, currently it has 3 codes P1504 Air control circuit in slow motion of the engine, the connector already changed it because it had false contact, p013 admission air temperature sensor- Admission air signal- High input signal Open circuit/short circuit From the position of the butterfly to Position sensor of the accelerator pedal a- low input signal short circuit A, I will check the entire electrical line in search of a cable that is stuck, someone who can help me solve this problem?

Saves Sosa here in Chile, the Ford bring all the same revolution problem, but it is something different you are walking to a semaphor and they are accelerated, it is the fault of the TPS, but in your case I would commit to clean the admission body and provar with TPS disconnected to see what happens, it is what it occurs to me.