Hi, What do I need to look for when conducting a fuel pressure test? I know my fuel pump should produce 5bar but when I turn the key off what should it be and for how long?
I remember from my Porsche days which runs a similar k-jet system the pressure drop slowly after turning off the key. When I changed to EFi I had a dial which showed the pressure all the time which was 3 bar. After turning the ignition off the pressure would drop quite rapidly, probably a couple of minutes back to zero.
