Question about 2003 Lincoln Navigator

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Replaced fuel pump and fuel filter and relays and the 03 lincoln navigator is still not starting? i have reset the reset button but still not getting power to the fuel pump, please help

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  • cheap repair Sep 27, 2010

    did you replace the crank position sensor?

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My 03 lincoln wont start over heated one day blew the radiator replaced it then 2 days later it didnt start my mechanic said it was my fuel pump replaced it still didnt start he said he needed to put my fuel reset button direct and still nothing? Any answers??

Posted on Jul 22, 2015

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  • Lincoln Master
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Your pump is controlled by the PCM. Recommend you interrogate the relay socket to see if the PCM is trying to turn it on. You could also jump the relay there to see if the truck will start. If you want to jump the relay socket, be careful not to put 12 volts into the PCM. You want to jump the hot terminal to the load terminal, which should have a much lower resistance than the PCM. Please see my tip at http://www.fixya.com/cars/r6022358-relay_check . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me.

replaced fuel pump and fuel - 0101149.gif

Posted on Sep 27, 2010

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  • Lincoln Master
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Try sparying some starting fluid in the air intake or throttle body. See if it starts momentarily. If yes it's a fuel issue. If not, look for a spark issue. report findings.

Posted on Sep 27, 2010

  • gerry bissi Sep 28, 2010

    Can you hear the pump hum in the fuel tank for 5 seconds when you turn key to ON?



    The PCM Powertrain Control Module, controls the fuel pump relay that turns the fuel pump on based on certain criteria. A power relay turns the PCM on when the key is in the ON position.



    Check fuse 28 (5 amp) and fuse 34 (20 amp).





    Alsobang on the bttom of the tank with your hand to see if you can jar the pump to free any debris trapped in it. The pump and filter are spring loaded aganst the bottom of the tank.



    report back.

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