I just installed this fitting on my 04.5 LLY with lift pump and EFI Live already on the truck, not having a low rail pressure issue, but slightly dropping rail pressure under WOT Pulls on my MAX EFFORT 230HP tune. We are not saying this is the cure to all low fuel rail pressure issues, but it is an easy low cost alternative and works, well at least in our case.
Ppe fuel pump code#
Once the ported fitting was in and the trucks were running, under the same throttle demand, neither truck have experienced the low rail pressure code or problem.
As you can see, a drastic size difference of the hole that feeds the fuel rails! Here is a picture below of the two fittings, PPE Ported on the left and the OEM Fitting on the right.
Ppe fuel pump install#
Install is very simple and takes approximately 30-45 min with basic tools (We will be doing a DIY on this product in our DIY Section shortly). In an attempt to eliminate the code without installing a lift pump, the DMAX Service Team installed the PPE ported rail fitting.
Ppe fuel pump mod#
Our two shop trucks, running EFI Live on the 120hp settings and above, with no lift pump, just the stock fuel system would throw the trucks into limp mod under extreme throttle demand, causing the Low fuel rail problem. PPE Claims that the PPE ported fuel rail fitting can reduce the chance of potential fuel rail drop. The DMAX STORE crew experienced good results with the addition of this part, so we figured why not do a short review of this product. We have done two of our own trucks in the past month, both with EFI Live tuning and no added fuel modifications that have experienced the low fuel rail pressure issue and codes.
By replacing the factory Fuel rail fitting, you can sometimes eliminate the low rail pressure drop. When you add a programmer, such as EFI Live Custom Tuning or a PPE hand held tuner, you run the risk of low fuel rail pressure under moderate to extreme throttle demand. This can happen with stock applications all the way to modified vehicles. We have experienced a few trucks (some of our own) that have had that dreaded fuel rail pressure drop under throttle resulting in the P0087 Low Fuel Rail Pressure that can result in the truck going into Limp Mod. The purpose is to provide fuel at the fuel pump intake during all driving conditions, especially when low fuel levels are present.As you know anytime you increase the demand for more fuel, the factory fuel system needs some sort of modification to keep up with the demand, rather if its an addition of a lift pump and or fuel rail modifications. The fuel reservoir is internal to the fuel pump assembly. Refer to the Fuel Delivery section for fuel pump service. (8) Use the DRB II tester ASD Fuel System Test to pressurize the fuel system. (7) Fill fuel tank, install filler cap, and connect battery cable.ĬAUTION: When using the ASD Fuel System Test, the Auto Shutdown (ASD) Relay remains energized for either 7 minutes, until the test is stopped, or until the ignition switch is turned to the Off position. Tighten quarter panel screws to 2 N Im (17 in. (6) Attach filler tube to filler neck opening in quarter panel. Refer to Tube/Fitting Assembly in the Fuel Delivery section of this Group. (4) Lubricate the metal tubes on the fuel pump with clean 30 weight engine oil. (3) Tighten fuel tank strap nuts to 23 N Im (250 in. Verify that the tube is installed correctly. Ensure filler tube grommet is not damaged. Use a light coating of power steering fluid to ease fuel filler tube installation. (2) Raise tank and fuel filler tube carefully into position. Position vapor vent so that it is not pinched between tank and floor pan during installation. Connect vapor separator/rollover valve hose and position insulator pad on fuel tank. (1) Position fuel tank on transmission jack. (9) Remove tank mounting straps and lower tank. (8) Carefully work fuel filler tube from tank. Remove hose from pressure relief/rollover valve. Loosen tank mounting straps and lower tank slightly. Refer to Quick Connect Hoses in the Fuel Delivery section of this group. (6) Disconnect the fuel supply and return hoses from fuel pump. (5) Disconnect fuel pump and gauge sending unit electrical connectors. WARNING: WRAP SHOP TOWELS AROUND HOSES TO CATCH ANY GASOLINE SPILLAGE.
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