I tested the fuel pressure and not sure what to make of it. First I tested the fuel pump by applying 12 volts to the test terminal. All is well, I hear the whinning sound. Now connecting the gauge to the schrader valve, key in the on position, the pressure is low, 10 psi. I started the car, pressure jumped to specs, 32 psi. From there all checks out OK. I tapped the throttle, pressure jumps about 5psi. Removed the pressure regulator vacuum, pressure jumps about 10 psi. I did change the ECT, no effect on starting, however I believe the idle is improved and the exhaust smells better. I believe it was a little rich before.
I did notice when tapping the throttle, there is a very slight hesitation. Very slight! What should I do at this point? Why is the fuel pressure low when the key is in the ON position?
have the same problem?
Thursday, July 29th, 2010 AT 5:32 PM