Question about 1990 Plymouth Voyager

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Engine not getting fuel. Can not hear fuel pump come on when ignition turned on. Should the fuel relay be checked before replacing fuel pump? where is the relay located?

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Great question............You are right and the sensor is located jost downstreem of the fuel pump and make sure all fuses are servicable......................Hope this helps.

Posted on Oct 16, 2010

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Vehicle motor turns but not fuel supply


You don't say if you have checked that the Fuel Pump is working.

1. You need to check that the fuel pump is operating and getting power.. Have someone turn on the ignition (but not start the engine) If you listen near the FP location you should hear the fuel pump run for 3 seconds and stop. If in doubt do this a couple of times until you can hear the pump run and stop.

2. If you cannot hear the pump running check the fuel system related fuses.

3. If the fuses are good check that the relay for the fuel pump you replaced is functioning. Have someone turn the ignition on and off a few times and listen for the click from the relay or put your finger on it.

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If you can hear it working and it still won't start, remove the fuel line going to injector rail and point into a jar whilst someone turns engine over. You should have fuel coming out. If this is fine, go back to ignition, remove a spark plug and turn engine over checking for a spark.

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hi, when you turn the ignition on do you hear the fuel pump start up if you do then the pump is fine if how ever you hear nothing then the chances are its going to either be the fuel pump or fuel pump relay, if you have a look in your fuse box you should be able to find the fuel pump relay if you cant locate it then its best you get a manual to show you the relays location, you can then put a finger on the relay and when you turn the ignition on you should feel a little click coming from the relay if you hear this then the pump needs replacing but if you hear or feel nothing then the chances are the relay needs replacing.

you can also check if the pump is working by removing the fuel feed hose from the injector fuel rail then once this is removed you put a tub under it then turn the ignition on if you have fuel shooting out then you know the fuel pump and relay are ok and you need to start thinking of some other problem such as ecu etc,

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I would check the ground for the fuel pump relay that operates the switch side of the relay.
You should have 2 12v inputs to the relay. When the relay gets 12v input, it closes the relay switch on the heavy current side that sends 12v to the fuel pump.

A relay is needed because you don't want heavy current going through the switch.

Also, most cars only run the fuel pump for 2 seconds when the key is turned on because you don't want the fuel pump running without the car running. If you listen closely at the fuel tank, you should hear the pump run for 2 seconds when you turn the key to "ON"
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So, I would check the switch side of the relay. Power amd ground.

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