This power loss is usually temporary but can become more severe as the fuel pump deteriorates. If the fuel pump is failing, it might not be able to keep up with the engine’s demands, causing a noticeable drop in power as you try to accelerate. A properly functioning fuel pump should be able to deliver the required amount of fuel to the Jeep Grand Cherokee’s engine when you step on the gas pedal. Power Loss While AcceleratingĪnother common symptom of a failing fuel pump is a sudden loss of power when you try to accelerate. If your Jeep Grand Cherokee is experiencing engine sputtering or cutting out for brief periods, this could be a sign of a bad fuel pump. This happens because the fuel pump is unable to provide a consistent flow of fuel to the engine. If your fuel pump is not functioning correctly, you may notice your engine sputtering at high speeds. Long cranking times and the Grand Cherokee running irregularly are other possible indicators of a failing fuel pump.īy being attentive and catching these issues early on, you can address them appropriately and keep your vehicle running smoothly. If you find your car struggling to start or losing power, this could also indicate a fuel pump problem. StallingĪnother telltale sign that the Toyoat Grand Cherokee’s fuel pump is going out is stalling, often followed by the engine restarting after several minutes. After it has primed, you may hear a high-pitched whining noise, which can indicate a fuel pump that is failing. The sound clip above is a fuel pump priming. Here, we’ll discuss three key indicators that your fuel pump might be failing. When determining if your Jeep Grand Cherokee’s fuel pump is going bad, there are a few common symptoms to look out for. Identifying Bad Fuel Pump Symptoms Typical Fuel Pump If your Grand Cherokee’s check engine light is on, and it has code P0087, there’s a lack of fuel pressure, and you’re on the right track.Running low or out of gas can damage a fuel pump and shorten its life.Catching issues early can prevent further damage to your Grand Cherokee and help avoid being stranded.Be aware of the warning signs of a bad fuel pump, such as a whining noise, stalling, and trouble starting your car.Your fuel pump is responsible for pushing fuel from your vehicle’s fuel tank to the engine, but when it starts to fail, your engine may suffer run rough, have trouble starting, or not start at all. Refer to Fuel Tank Installation.A bad fuel pump can cause a myriad of problems for your Jeep Grand Cherokee, making it essential to be aware of the warning signs that indicate trouble. ![]() (8) Connect fuel return and pressure lines to fuel pump module fittings (Fig. (6) Install Special Tool 6856 to locknut. This step must be done to prevent float/float rod assembly from contacting sides of fuel tank. Align arrow to tick mark on top of fuel tank. (5) Rotate module until indexing arrow at top of module (Fig. (4) Position locknut over top of fuel pump module. (3) Apply clean water to locknut threads. (2) Using new gasket, position fuel pump module into opening in fuel tank. Do not use carburetor cleaner to clean threads. (1) Thoroughly clean locknut threads and mating fuel tank threads. The fuel pump module will spring up slightly after locknut is removed.ĬAUTION: Whenever fuel pump module is serviced, module gasket must be replaced. Install Special Tool 6856 to fuel pump module locknut and remove locknut (Fig. (5) The plastic fuel pump module locknut is threaded onto fuel tank (Fig. Refer to Quick-Connect Fittings for procedures. (4) Disconnect fuel return and pressure lines from fuel pump module fittings (Fig. (3) Thoroughly wash and clean area around pump module to prevent contaminants from entering tank. (1) Perform Fuel System Pressure Release Procedure. BEFORE SERVICING FUEL PUMP MODULE, FUEL SYSTEM PRESSURE MUST BE RELEASED. WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF). Refer to Fuel Pump, Fuel Filter/Fuel Pressure Regulator and Fuel Gauge Sending Unit.įuel tank removal will be necessary for fuel pump module removal. ![]() If the electrical fuel pump requires service, the entire fuel pump module must be replaced. The fuel gauge sending unit and pick-up filter may be serviced separately.
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