How to troubleshoot a GM fuel pump relay?
The following tutorial may be of help: Troubleshooting The Fuel Pump (GM 4.3L, 5.0L, 5.7L) (at: troubleshootmyvehicle.com ). The following links will help you comparison shop for the fuel pump relay:
What should fuel pressure be when fuel pump relay is activated?
If the fuel pump relay is activating the fuel pump, then it’ll register about 56-62 PSI even if the engine does not start. Any fuel pressure below 50 PSI and the engine will NOT start. If you do see any fuel pressure below 50 PSI, the fuel pump although working, is not creating enough pressure to start the engine and is defective.
Why does my fuel pump not start when I change it?
You always want to replace the fuel filter when replacing the fuel pump. This could cause the concern you are having. It may seem as you are getting enough fuel from the pressure regulator but if the pressure from the fuel tank is not correct, it will still not start. Another problem you could be having is spark.
Is there no power to the fuel pump?
No power to the fuel pump and the fuel relay is not getti… Q: No power to the fuel pump and the fuel relay is not getting power. My car has 190000 miles.
How can I tell if my fuel pump relay is faulty?
2. Engine does not start. Another symptom of a faulty fuel pump relay is an engine that does not start. If the fuel pump relay fails the fuel pump will be left without power. The engine may still crank when the key is turned, however it will not be able to start due to lack of fuel.
If the fuel pump relay is activating the fuel pump, then it’ll register about 56-62 PSI even if the engine does not start. Any fuel pressure below 50 PSI and the engine will NOT start. If you do see any fuel pressure below 50 PSI, the fuel pump although working, is not creating enough pressure to start the engine and is defective.
Why is my fuel pump not working when I replace it?
The concern with the fuel gauge is a common issue when replacing the fuel pump. The fuel level sensor is a separate component attached to the fuel pump. This part does not always come with the fuel pump and sometimes is not interchangeable with aftermarket fuel pumps. Chevrolets have a common issue with fuel filters getting clogged.
How to test a GM 4.3L fuel pump?
More GM 4.3L, 5.0L, and 5.7L Tutorials. It’s very important that you start off your fuel pump relay diagnostic by first testing the fuel pump pressure with a fuel pressure test gauge. If the fuel pump relay IS NOT activating the fuel pump, the fuel pressure test gauge will register 0 PSI when cranking the engine.