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loosen the fuel line and if fuel squirts forcefully out the pump should be good,but it's really hard to tell pressure wise if you have fuel injectors they need a specific pressure to run.
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∙ 16y ago
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How do you know if its the fuel pump relay in not the fuel pump?
If you turn on the ignition key without starting the engine you should hear the fuel pump run for a few seconds. If you do not check the fuel pump fuse and replace the relay before proceeding. If the fuse is good and the relay is good then you know the pump is more than likely defective.
How do you know if you need a fuel filter or pump?
well you should be able to hear the fuel pump humming or buzzing from the filler tube on the tank while the ignition is on run then if not check the fuse and relay for the fuel pump if there good then you know its the pump
Your 1993 buick park avenue has no power to the fuel pump but fuel pump is good what do you do?
If you know positively the fuel pump is good then either the fuel pump fuse is blown or the fuel pump relay is defective. Inspect the fuse and replace the relay. Also be sure and replace the fuel filter as it may be partially clogged. A partially clogged filter will ruin a fuel pump.
92 camaro fuel pump is good. Bypassed the computer with a hot wire to the fuel pump. Tried to crank the car. The car cranks and then dies unless i pump the gas pedal continuously. changed the dist. to?
First, how do you know that the fuel pump is "good"? The assumptions that we make are often responsible for making automotive diagnostics difficult. If you haven't used a fuel pressure gauge at the test port there is no possible way to know that the fuel pump is good.
How do you know if it's the fuel pump that went out?
Open the fuel filler door, and remove the fuel cap, and have someone turn the ignition switch on without starting the engine, while you listen at the fuel filler opening. If you hear the pump run then you at least know the fuel pump fuse and fuel pump relay are good. But that does not necessarily mean the fuel pump is pumping fuel it might just be running. The only way to verify if it is putting out the proper pressure is with a fuel pump pressure test. If you do not hear the fuel pump run for a few seconds and then shut down, check the fuse and the rely for the fuel pump. If the fuse and relay are good you know the pump is defective and needs replacing. Be sure and replace the fuel filter.
How do you know when fuel pump relay is bad?
Swap it with a known good one.
How do you know when to replace a fuel pump on a 03 dodge durango?
When the vehicle will not start, you cannot hear the pump run and you know the fuse and relay are good, or when you have low fuel pressure, even though the pump is running, and you know the filer is not clogged.
How do you tell if the fuel pump is bad or if it is the fuel pump relay?
If you turn on the ignition key without starting the engine you should hear the fuel pump run for a few seconds. If you do not check the fuel pump fuse and replace the relay before proceeding. If the fuse is good and the relay is good then you know the pump is more than likely defective.
If you know the fuel pump is good on your '05 Expedition why do fuel pump fuses keep burning out?
Electrical Short. Pinch wire. Grounded Wire. exc.
How do I know if my fuel pump is bad?
A fuel pump pressure test could determine the condition of the fuel pump and fuel system.
If my fuel pump is good my pump relay is good but still don't get fuel why?
injector is bad
How do you know when a fuel pump on a Cadillac deville is gone bad?
Open the fuel filler door and remove the gas cap. Listen at the fuel filler opening while a helper turns the ignition on but does not start the engine. The pump will run for a few seconds and then shut off. If you do not hear the pump check the fuel pump fuse and the fuel pump relay. If they are good then the pump is more than likely defective. If you hear the pump then you know it is running but that does not mean it is pumping fuel. A fuel pressure test will verify the condition of the pump. Be sure and replace the fuel filter.
