Fuel pressure drop after engines off
#1
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Location: Nashville, TN
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Fuel pressure drop after engines off
I just installed a lift pump and an electric fuel pressure gauge. At idle it has 12 to 14 psi. When accelerating uphill it drops close to 5 psi. When I cut the engine off the electric fuel pressure gauge shuts off also. In the 6 or 7 seconds it takes to turn the key back on and the electric fuel pressure gauge to settle down the fuel pressure has already dropped to zero. Is that normal or should the pressure drop slower ? Thanks
#3
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Location: Sonora, Ca
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Mine does the same thing. But if I were you I would get the Vulcan Big Line Kit and L/P relocation kit. My pressures were the same as yours. After I put the Kit on I could not pull it down past 12 psi.
#5
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Pulling the pressure down to 5PSI is a warning sign. Replace the stock LP with an aftermarket set up when it gets lowers. Walbro or FASSII. I can't pull my FASS below 15 PSI.
No more stock LP's.
Pulling the pressure down to 5PSI is a warning sign. Replace the stock LP with an aftermarket set up when it gets lowers. Walbro or FASSII. I can't pull my FASS below 15 PSI.
No more stock LP's.
#6
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That's exactly what mine did after I did the Big line kit. I hope it keeps the vp cooler too.
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