[jmille]

Have an interesting observation.

Just installed a fuel pressure gage on my Holley 4160 fuel log. Car is equipped with a 392 stroker with a Carter mechanical fuel pump and a fuel filter back by the tank.

When I first start the car gage shows 6.5 psi fuel pressure. Every thing looks normal. Close the hood and go for a little spin. Return home pop the hood and read 2 psi. Let the car sit for an hour or so start the engine now I have 3 psi. Also note that when I shut the engine off fuel pressure bleeds to 0 in 3 or 4 seconds.

Engine seems to run OK on street and track. Didn't suspect any problem till I installed the gage. Still don't know if I have any problem. But what I expected was constant fuel pressure some where around 5 to 8 psi. I expected that the valves in the fuel pump would prevent pressure bleed down. Or at least it would take several minutes to bleed off.

Things I think it might be.

Bad fuel pump valves.

Plugged fuel filter causing excessive suction on tank line which in turn causes some sort of vapor lock????

Its just normal and don't have any thing to worry about??

Thanks in advance for the help.
Jerry