Apr 30, 2022 · Any codes? Since your test of the commanded FPR seems to be having an effect on the engine, if you get really stuck I would leave +5/gnd only connected to the Fuel Rail …

Sep 27, 2024 · My test show very high fuel rail pressure if I can get it started. Starts about 8,000psi and soon jumps to 11,000-12,000 psi before it dies. Low pressure side 60-62 …

Mar 9, 2025 · Observe the Fuel Rail Pressure Sensor parameter with a scan tool The fuel pressure should be 200 MPa (29,000 psi). If the fuel pressure is 0 MPa (0 psi), test the FRP …

Nov 10, 2011 · On the fuel system return side, the return lines are now equipped with snap-in connections. The return side is under pressure. A pressure retention valve maintains 0.4 to 1.1 …

Nov 18, 2025 · I did a little test i unplugged my FRP You meant FPR (fuel pressure regulator), right? Or did you mean FPRS Fuel rail pressure sensor? It's difficult to keep all those abbrs …

Mar 4, 2013 · How do i check the fuel pressure and with what tool, can i do it with a standard fuel tester? What should the psi be. Thanks! 2004 Lb7

Dec 17, 2024 · The #7 injector returned 10 ml of fuel, which is higher than spec, but not bad enough in my opinion to cause a no start and loss of prime.The other injectors all returned …

Oct 12, 2012 · You can try to methods to test for this.... One is to hook up an air line to the fuel tank and regulate it down to about 12-15 PSI. It should hold the pressure but if it doesn't what …

Jun 12, 2011 · So what's the best spot to plug in your fuel pressure gauge? I finally found the adapter to check it at the bleed screw on top of the oem fuel filter. I...

Feb 23, 2017 · Spec is 3 to 5 ml depending on a piece rating of fuel.... but ya anything over 3 to 4 range no good. But if u have access to service information or all data under high pressure side …