Intermittent fuel pressure

[DIESEL6]

Lets see if anybody can figure this one out-
2005 Ford 6.0-Fuel pressure from GlowShift gauges shows fuel pressure at about 60psi idling and driving. While driving, turning left or right, or even slowing down, the fuel pressure drops 5-10psi, and a few times to zero and truck stutters to shut off, and then jumps right back to 60psi. Ive even seen it jump from 60psi to 70psi. Now with that said, I have already replaced the Fuel Pressure Regulator (Blue Spring Twice), replacing my Air Dog with a FASS and I am using a Beans Tank sump for fuel and return. I have checked the bowl and it was empty, cranked the truck and it filled immediately but drained out on its own??? NO LEAKS......The truck runs good until all that happens. HELP!!!!

 

[Racer71]

Check the sender for bits of the strainer coming apart and clogging the lines. Also make sure the hfcm is constantly running. I’ve also seen one where the oring for the regulator seat was bad and wouldn’t hold pressure.

 

[webb06]

Check the sender for bits of the strainer coming apart and clogging the lines. Also make sure the hfcm is constantly running. I’ve also seen one where the oring for the regulator seat was bad and wouldn’t hold pressure.

He’s using a fass and sump. Good ideas to check for a stock truck though


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[webb06]

Lets see if anybody can figure this one out-
2005 Ford 6.0-Fuel pressure from GlowShift gauges shows fuel pressure at about 60psi idling and driving. While driving, turning left or right, or even slowing down, the fuel pressure drops 5-10psi, and a few times to zero and truck stutters to shut off, and then jumps right back to 60psi. Ive even seen it jump from 60psi to 70psi. Now with that said, I have already replaced the Fuel Pressure Regulator (Blue Spring Twice), replacing my Air Dog with a FASS and I am using a Beans Tank sump for fuel and return. I have checked the bowl and it was empty, cranked the truck and it filled immediately but drained out on its own??? NO LEAKS......The truck runs good until all that happens. HELP!!!!

I’d be checking your wiring. Or verifying that the fass isn’t shutting off when you’re losing pressure.

Do you still have the factory hfcm or Did you bypass it?


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[bismic]

Draining out on its own isn't a huge deal.

How old is the FASS pump? They have had their share of issues over the years.

 

[DIESEL6]

I’d be checking your wiring. Or verifying that the fass isn’t shutting off when you’re losing pressure.

Do you still have the factory hfcm or Did you bypass it?


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The factory pump is gone.

 

[DIESEL6]

Draining out on its own isn't a huge deal.

How old is the FASS pump? They have had their share of issues over the years.

The FASS is less then 1 yr old.

 

[DEEZUZ]

The FASS is less then 1 yr old.

I don't care. I've had issues with them out of the box.