HERE IS AN INTERESTING SCENARIO YOU SHOULD KNOW! Visit for more info about this money saving product.Ĭlick here for more info about this money saving product. It will tell you when the restriction in the filter necessitates replacing the filter, which means you will change your filter by restriction rather than the seat of your pants and save replacement filter costs! It will also tell you if the lift pump fails mechanically or electrically.
We suggest installing our “Low Fuel Pressure Warning Kit” permanently anyway to constantly monitor fuel pressure, as a diagnostic tool and a future money saving tool. Please realize that revving it up proves NOTHING, as it doesn’t use the amount of fuel that a load does. If it doesn't make at least 5 PSI UNDER LOAD after changing the filter, then change the lift pump. If, after changing the filter, it DOES make at least 5 PSI at idle, go DRIVE the truck UNDER LOAD, and determine if the pressure ever goes below 5 psi. The long hose allows you to drive the truck and watch the gauge at the same time! Or, if this is inconvenient for you to come by, you can install our “Low Fuel Pressure Warning Kit” and it will diagnose low fuel pressure for you. To test fuel pressure, install a fuel pressure gauge with a long hose on it AFTER the fuel filter and before the injection pump. If you DO hear it run and it doesn't make at least 5 PSI at idle, replace the fuel filter. If you don't hear the lift pump, test for 12 volts going into the lift pump and if it doesn't run with 12 volts going into it, replace it. To diagnose lift pump performance, click the ignition key to the start function quickly, so the engine doesn't start, and let go, leaving the key in the run position (the lift pump should run 25 seconds). If you do experience these symptoms, replace the fuel filter and if you can’t bleed the system afterwards, or if changing the filter doesn’t fix the problem, please read on. A weak or failed lift pump or a plugged fuel filter will not give any other drivability issues other than a skip, miss or buck at high load/high RPM operation. If your truck "bucks" under hard load or towing, this is an indication the engine is starving for fuel, due to either a restricted fuel filter or low lift pump pressure.
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