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Stephanie
Stephanie 10/8/2012
2002 Buick Rendezvous CXL 6Cyl3.4L - Engine
Just replaced fuel pump and its still acting like how the old one was there is no power getting to fuel pump
My car won't start befor I replaced the fuel pump my old one did the same it acted like it was out of gas so we put more gas in it and it still will not start it cranks but won't start
7 Answers
  • HouseCallAuto
    HouseCallAuto 10/8/2012
    1. At the fuel tank check the Gray wire for 12 volts when cranking and the Black wire for ground at all times.

    2. If low voltage or no voltage then check the connector in the floor of the body just behind the driver's seat for being corroded.
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    HouseCallAuto
    Stephanie 10/9/2012
    And if it is corroded. How do I clean it
    HouseCallAuto
    Stephanie 10/9/2012
    Does my car have a fuel shutoff reset switch or a fuel pump reset switch cause I can't find it any where
  • felplay auto repair.
    When you turn ON the ignition switch, the control module enables the fuel pump relay which powers the fuel pump ON. The fuel pump remains ON as long as the engine is cranking or running and the control module receives ignition reference pulses. If there are no ignition reference pulses, the control module shuts the fuel pump OFF within 2 seconds after the ignition was switched to the ON position or if the engine stops.
    Listen for an audible hiss from the fuel pump when the fuel pump relay is commanded ON.with the key on. A vibration in the fuel feed line when the fuel pump relay is commanded ON indicates that the fuel pump is operating.



    Reply
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    felplay auto repair.
    Stephanie 10/9/2012
    Would I have to reset computer a lot of people has been telling me to do this and if so how do I do that
    felplay auto repair.
    Stephanie 10/9/2012
    Does my car have fuel reset switch or fuel pump reset switch on it people keep telling I do but I can not find it any where
  • HouseCallAuto
    HouseCallAuto 10/9/2012
    No, your car has no fuel reset switch like Ford uses. Restting the computer is not necessary.
    Reply
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  • felplay auto repair.
    Are you sure is the fuel the problem? what test have you done? what was the symptoms before this happen..can you hear the pump for 2 second when you turn the key on position?
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    felplay auto repair.
    Stephanie 10/9/2012
    It acted like it was running out of gas no don't hear fuel pump that's why I replaced it cause we did not hear the old one so we got a new one and its still doing the same thing fuses and relays all have power but underneath the car from driver seat and back to gas tank no power and no power to the new fuel pump it acts like it wants to start but no fuel getting to fuel injectors and if it is a wiring problem I don't no where its even at
  • felplay auto repair.
    I guess you have a voltmeter do this test at the fuel pump relay base, remember there are two circuits to test the coil and the contacts, if you look at the relay pins you will see 30, 87 contacts 85 and 86 coil..
    RELAY BASE FROM 30 TO 87 SYSTEM VOLTAGE
    FROM 85 TO 86 SWITCH OPEN GHOST VOLTAGE NO VOLTAGE
    FROM 85 TO 86 SWITCH CLOSE SYSTEM VOLTAGE..LET ME KNOW I'M SURE WE CAN FIND THE PROBLEM..
    Reply
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    felplay auto repair.
    Stephanie 10/9/2012
    Do I need a voltmeter to do this cause I don't have one
  • HouseCallAuto
    HouseCallAuto 10/9/2012
    Stephanie, check the connector that I told you to check. This connector is well known for corrosion and causes a loss of the fuel pump circuit.

    If low voltage or no voltage then check the connector in the floor of the body just behind the driver's seat for being corroded. You can do this check with a voltmeter or even a 12 volt automotive test light. If there is corrosion in the connector, it will be evident what you have to do to fix it. either clean the pins or in the case where the pins are too damaged to recover, cut and splice the gray or back wire (the gray is the 12 volt wire that powers the pump and the black wire is the ground for the pump) and bypass the connector.
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  • felplay auto repair.
    Well you been told us have no power at the fuel pump, how do you no that? you need to test for voltage there is connector close to the rear wheel driver side look for the gray wire back probe with a T pin with the key on 12 V black wire 0 V ...
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