How to Check for Fuel Delivery in a Plymouth Voyager
- 1). Check the Voyager model's fuel delivery system if the engine starts running rough, stalls out in traffic or won't start at all.
- 2). Relieve fuel system pressure. Find the power distribution center and disconnect the fuel pump relay. Start the engine and let it run until it stalls. Turn the ignition off and disconnect the negative battery cable.
- 3). Disconnect the fuel pressure sensor vacuum hose. Check for fuel in the line. If there is fuel present in the line, the fuel delivery problem is likely caused by a faulty fuel pump pressure regulator. If there is no fuel in the line, reattach the vacuum hose and continue with the fuel delivery diagnostic.
- 4). Twist off the fuel pressure test port cap and attach a pressure gauge to the fuel pressure valve. Reconnect the negative battery cable and start the engine. Check the gauge. It needs to register approximately 50 psi. Pressure that's too high indicates a malfunctioning pressure regulator. Low pressure indicates a clogged fuel filter or a broken fuel pump.
- 5). Cut the engine, relieve system pressure again and remove the negative battery cable.
- 6). Raise the Plymouth Voyager so you can access the underside of the vehicle and support the gas tank with a second jack. Remove the fuel lines to the fuel pump. Remove the straps and stays that hold the fuel tank. Lower the tank and remove the fuel filter.
- 7). Examine the filter for clogs and replace if necessary. If there are no clogs, the fuel delivery problem is probably caused by a breakdown in the fuel pump itself.
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