Regarding the 535is question I posted before. Located and tested the relay (thanks to your diagaram) and it tests fine. The fuel pressure holds stead at 38psi and when car dies/turned off, it still holds 38 psi in the rail.
The ground from the relay is open until the car starts and then it closes. When the ground opens the car dies. But the fuel pressure is maintained at 38 psi indicating that there is a closing switch to ground further down stream. This also indicates to me that the fuel system is not an issue and also the fule pump relay is not the culprit either.
What switches the ground from the fule pump relay to the actual ground further down stream? Is that the computer, another relay or is it possible that the computer is not grounded properly?
BTW, where is the computer located?
Thanks for your reply.
Wednesday, February 1st, 2012 AT 6:25 PM