Fuel Pressure
02-28-2012, 03:44 PM
#1
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Fuel Pressure
Hello I own a 2005 F-150 Super Crew 5.4 3v. I have an Edge CT programer. I keep getting a fuel pressure desired alert. It happens when I take my foot off the gas or when I have the cruise set, I get the alert when im heading down an decilne. I also have been getting a (FRP) fuel rail pressure alert some times this doesnt happen all the time. I was looking through the repair manual and there is nothing that talks about a pressure regulator. The only thing I can even think that might be close is the fuel pump driver module. Please help.
02-28-2012, 03:51 PM
#2
The pump driver and pressure sensor on the rail control the pressure 
02-28-2012, 04:17 PM
#3
Senior Member
To expand a little:
This isn't a classic return type duel system, which would have a regulator and a return line to dump excess fuel back to the tank.
THe Fuel pressure sensor on the rail senses the pressure, and adjusts the fuel flow rate from the fuel pump via the Fuel Pump driver module.
This isn't a classic return type duel system, which would have a regulator and a return line to dump excess fuel back to the tank.
THe Fuel pressure sensor on the rail senses the pressure, and adjusts the fuel flow rate from the fuel pump via the Fuel Pump driver module.
02-29-2012, 01:55 PM
#5
Senior Member
In addition, the Fuel Pump Driver module is a common point of failure in the fuel systems.
