Question about 2000 Ford Expedition

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Ford ranger 2002 the fuel pump will not pump in cold weather, when it is colder than @34 F. In warm weather when I turn the ignition key I can hear the fuel pump pressurize and the truck will start. In cold weather the the starter crank the engine, but fuel pump will not pressurize or pump. In cold weather if I use a heater to warm up the engine compartment, then you can hear the fuel pump pressurize and the engine will start. Hope you can help, thanks.

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  • Ford Master
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There is no way around this the bearings are won in the fuel pump replace it, it is not that expensive.

Posted on Feb 04, 2010

  • ted59ray Dec 24, 2010

    I just want to know if replacing the fuel pump fix the problem. Cause i have the same thing going on with my truck.

  • yadayada
    yadayada Dec 24, 2010

    Yes these pumps are famous for sticking (no fuel pressure) in cold weather, have heard this complaint many times over the years in the Ford dealer I worked in before I retired. If you suspect water then add a cup of Denatured Alcohol (available at hardware stores) to the fuel tank during fill up. The Alcohol will absorb any moisture in the tank and lines

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Well my guess would be simply water in the fuel, but like i said its a guess. almost all of todays fuels have up to 10% alcohol in it and alcohol loves water, so it can actually pull it out of the air. but alcohol also dont freeze. but due to the temp that you give its my best educated guess.

Posted on Feb 04, 2010

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  • Ford Master
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Hi:
your fuel pump is located in your fuel tank, so warming the engine compartment. Under the hood is a fuel pump relay that could be suspect . It supplies power to the pump when you turn on the key, so locate it and check it out.

Posted on Feb 04, 2010

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2 Answers

I have a 1987 ranger 2.3 EFI and sometimes it will not start when it's cold. after it warms up outside it starts. When it does start it runs great. It always starts when warm. some times it will


Timing belt being off one tooth will not cause this problem but rather loss of power and hard starting all the time,

in the cold it will not start, the engine will spin but wont fire is this correct?

There are many things that can cause this, a little testing will be needed, the first thing that comes to mind with the ford and cold weather is the coolant temp sensor, it give computer a false reading and can cause hard starting or even no start, a scan tool would be helpful to see what temp it is give computer.
The best way to narrow this down to to check for spark when it wont start, a weak coil in cold weather will cause this problem or bad coil wire to cap, but if you can see if it has spark and let me know,
another test is to check fuel pressure, to see if it is getting fuel, and the fuelpump relay,

Let me know if it has spark or fuel when is does not start, good day

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