Fuel Pressure Regulator hiss
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Fuel Pressure Regulator hiss
I am having trouble with my Z staying on. It runs, then sputters, then dies.
I am convinced it is plumbing related. Here is what I have unanswered so far:
I am convinced it is plumbing related. Here is what I have unanswered so far:
- Fuel pump on Acc. does not stop humming, sometimes even slightly changes pitches. It hums for as long as I stay in Acc.
- Fuel Pressure Regulator makes a hissing noise (almost like when you turn on a sink), but there is no sign of a leak anywhere.
- Sparkplugs have nice white coating on the node (lean).
- Fuel filter is brand new.
- Fuel pressure test kit yielded zero psi on crank and during the 3 seconds it stays on. This makes me think that perhaps it only stays on and uses the fuel that was initially primed into the lines.
- What is going on? (that is a given)
- Should my fuel pump stay on for that long in Acc.?
- How do I test if my fuel pump has a good ground?
- Could my FPR be bad but not show symptoms like fuel leak etc?
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