Archived Weird Fuel Pressures

[DSteele]

I am out of ideas and my fuel pressure is what?

First time last week fuel pressure showing on Edge Attitude went to 0,

Cleaned connection at fuel pressure sensor and pressure showed 3-7 lbs.

The next day fuel pressure showed 18-20 lbs. (normal for this truck with it's FASS system, a few days later 0 now if I disconnect the lead to the fuel pressure sensor it shows 33-34 lbs disconnected and 0 lbs connected.

Any takers on this one?

 

[ENafziger]

Can't help you out, but I have a GDP Walbro fuel system and a DiPricol Optix gauge, and show the same symptoms the past couple days. Normal fuel pressure is 17 - 20 psi, now all I'm seeing is variations between 3 and 7 psi. I just changed the fuel filters, and the problem is the same.

 

[hackengineering]

Are you still running the mechanical lifter pump. Before i installed my extra pusher pump i was running 3-7psi with just the lifter. When my Holly blue pump went out last week it would either be 0psi or 6psi since it had to push fuel through a dead pump. Attach a manual read fuel pressure gauge to confirm your readings.