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it will depend on the year of the car mechanical fule pumps turn with the motor electric pumps should pump as soon as you turn the key to the on position just before the starter enguages

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βˆ™ 2006-08-26 12:45:59
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Q: Why don't the fuel pump turn on when the key is on the fuel pump is good?
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What other than the fuel pump would keep the fuel from entering the fuel filter?

Blockage in the fuel line, remove the fuel line at the fuel pump, and use compressed air to blow thru the line from the feed to the fuel filter, if it blows thru then you dont have a blockage, make sure your fuel pump is coming on when you turn on the key, if not check to see if you have 12 volts at the pump when you turn the key on, if not check the fuel pump relay, if you do have 12 volts at the pump when you turn the key on, check the connections on the fuel pump or replace the fuel pump with a new one. make sure to disconnect the battery before removing the fuel pump.


If you try to start your car starter good battery good still wont start is it the fuel pump?

Does it turn over? Does it have spark? Does it have fuel? Does it turn over? Does it have spark? Does it have fuel?


97Jeep Cherokee when you turn key forward you can hear fuel pump turn on but it doesnt shut off is there a quick fix or is it your pump?

I dont understand, If you can hear it turn on then it must have been off to begin with. The fuel pump will run as long as the key is on, it has to for the engine to operate.


If you can hear the fuel pump kick on when you turn the key on is the fuel pump still working.?

If you hear the fuel pump run that is a good sign it is working however, a fuel pump pressure test would tell you if the pump is meeting the required pressure.


Will the fuel pump relay make the fuel pump cut off and on?

yes, the purpose of the relay is to signal the pump to turn on and off, if its not working at all the fuel pump will not turn on.


New fuel pump still no fuel?

Is the fuel pump actually running. Turn the ignition to the on position without starting the engine and you should hear the pump run for a few seconds. If you do not check the fuel pump fuse and fuel pump relay. If they are both good replace the fuel filter as it may be clogged. Lastly, it is possible that new fuel pump is defective.Is the fuel pump actually running. Turn the ignition to the on position without starting the engine and you should hear the pump run for a few seconds. If you do not check the fuel pump fuse and fuel pump relay. If they are both good replace the fuel filter as it may be clogged. Lastly, it is possible that new fuel pump is defective.


How do you know the fuel pump works on a 1986 Toyota Pickup?

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How to tell is its fuel filter or fuel pump?

If you turn on the ignition without starting the engine you should hear the fuel pump run for a few seconds. This is a good indication the fuel pump is good but not 100% positive. A bad fuel pump can run but not pump fuel. If you hear it for run for a few seconds just replace the fuel filter to make sure it is not clogged. If it still does not pump have a fuel pressure test run to verify the condition of the pump.


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.


Fuel pump will not turn on on a 2003 Chevy Malibu?

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Why dont my fuel pump shut off sometimes when I turn my car off it only happens sometimes is it an eletrical problem or faulty pump you put a new relay in already didnt do nething on my 89 Camar?

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How can you tell if Chevy blazer fuel pump is good?

First make sure the fuse to the fuel pump is good then pull the fuel supply line to the carb and turn the key on and see if fuel pumps out (note: make sure you have a bucket the catch the fuel.) If fuel pumps out, the fuel pump is fine, if not than it may be bad.

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