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Discussion Starter · #1 ·
Ok cant get a straight answer..
Should the truck lose fuel pressure once it sits for the night?

Last night turned truck off with 49 psi on guage..morning had no psi..it is cold enough for snow to stay..

Truck has new lines filter and pump as of 2 months ago and nee fuel regulator last summer..

Trying to pinpoint this occasional long cranking hot or cold.
 

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No, truck should hold pressure. If you didnt use a delphi or delco pump, that could be the issue. There may be a leak at a fitting, allowing the pressure to drop as well. Or there could be an injector leaking down dumping the fuel into the cylinder.
 
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