Thejuice for the fuel pump actually comes from the ign switch to the ASD relay and then to the fuel pump relay. The PCM indirectly grounds the fuel pump by grounding the two relays (ASD & fuel pump relays) which sent power to the fuel pump. Measuring for 12v down at the fuel pump harness would cut to the case; as Joe has suggested. 4 Engine Is Fully Dead. A malfunctioning fuel pump relay might potentially leave the engine completely dead and unable to start. Your engine won't start if there is no fuel pressure, and if the fuel pump relay fails, there would be no power to the fuel pump to provide fuel pressure. 5.
Youhave a bad fuel pump relay, bad fuel pump resistor or bad HP pump. This happens to mine every so often. I hate spending $300 on a damn relay again just after 2 years so what I did is run a +/- wire from battery to engine. When it happens, I unplug the HP pump, connect my leads to pump and then battery (unhooked when not needed) boat then
HowTo Harley Davidson Road King Fuel Pump Fail and Fix, Repair for $17. Pressure regulator housing has failed. This is a common problem on big V twin Har
Howto test and replace a fuel pump relay. The principles shown here apply to most vehicles. However, it's best to check with your vehicle's repair manual fo FuelPump Relay Issues. Another potential cause for bad fuel pump symptoms is a faulty fuel pump relay. This relay controls the power supply to your Silverado's fuel pump, and a faulty relay may lead to: Intermittent power loss to the fuel pump; Inability to start your truck; Unpredictable pump operation, leading to stalling or rough running FYI- The fuel pump on the 964 C2/C4 is NOT located under the front valence like prior 911 models. The fuel pump on the C2/C4 is located on the passenger side under floor area just behind the front diff C4 and the fuel tank. You need to remove a steel cover plate to access the fuel pump. FuelPump Relay - 409 Issue. I currently have a 2001 VW Jetta US GL 2.0, and my mechanic just diagnosed that my fuel pump relay (1J0 906 383 C - 409) is damaged. We tried calling all parts store in my area, but all they carry is the 7 pin 1J0 906 383 C Fuel Pump Relay. When we pulled the out the relay, it was an 8 pin, and had a "3DZ" printed BDVLG9.
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    • when a fuel pump relay is bad