Did you try starting with foot on accelerator pedal?
If the TPS is bad or out of adjustment, it can result in non starting without the aid of the accelerator pedal.
As to the TPS, try clearing the codes and see if they come back. What was the EXACT code you are getting?
P0507 is a fault with the IAACor idle control system and can be due to vacuum leakages etc.
Sunday, March 11th, 2012 AT 7:12 AM