Quote:
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Originally Posted by JoshBarber
Compare the Before and After (Im thinking maybe he only checked the regulator with the key on...which meant it only had a bit of pressure when the pump primed, and then dropped to 0psi as soon as it stopped...which might have not shown a leak) Does this sound like the regulator.
BEFORE-------------------------------------AFTER
KEY OFF : 0psi--------------------------------------55-60psi
KEY ON: 60psi prime - immed. drop to 0psi------------60psi prime - immed drop/hole @ 54psi
ENGINE @ IDLE : 54psi-------------------------------54psi
Sound like the regulator is opening to quickly?
The new pump basically just solved the problem with the line not holding ANY pressure. With the old pump it ran at 54psi but didnt hold when engine was off. Now it runs at 54psi, and holds in the line when shutoff.
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That is what the pressure reading indicate.
But to be sure that the fuel pump is good even if it is new pinch off the return line and see if the fuel pressure jumps up to around 75-85 lbs of pressure or more.
But do not hold/run it at full pressure on it for over 30 seconds.
If the fuel pump is not putting out good full pressure check things like voltage to it and grounds.
If it is good and capable of putting out the full pressure of 75-85 lbs then it points to the fuel pressure regulator not holding the correct pressure.
Let us know how it goes.
MT