Quote Originally Posted by Alien View Post
How does the FORD Vats/Pats whatever work? Isn't there something funky about it being really difficult to bypass on the 5.0, integrated with the fan control or something silly? IIRC, GM has a ground for the fuel pump and a signal to ecm for the injectors.
Ford EEC-IV (87-95) didn't have VATS/PATS. The injectors and fuel pump relay both rely on the computer to ground the circuit, which is why the grounds are so important...