Question about 1995 Jeep Grand Cherokee

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Fuel pump not running only in cold weather

Jeep runs fine in warm weather, but is VERY hard to start in cold weather, no fuel pump hum when key is turned on, when it finally does start, I have to keep pumping the gas pedal to keep it running until the engine warms up, then all is fine again. Help please

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  • Anonymous Mar 29, 2014

    as I said it as a hard time starting sometimes if u pump the gas pedal a few times it will start but then cat like it is gona cut off buch if u give it a gas and keep on for a few muns it will run. and it stalted with me twice yday as I was slowind down to turn in somwere

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How cold is it? below 32 degrees any water in your fuel will turn to ice the particles could clog your filter or freeze in the line try adding adding liquid heet its isoppropyl alcohol it will help

Posted on Jan 14, 2009

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Pumping the pedal on an injected engine does nothing, except varying the air intake amount. I would change the fuel filter (if badly plugged, it may be causing the pump to shut off early) and clean the idle air control valve.(which should regulate idle air flow, eliminating the need for playing with the pedal) The valve itself is not difficult to service, but is a bit delicate. It can be cleaned with carb cleaner. just make sure you do not turn the valve end around while cleaning, and re-install it perfectly straight. You may have a bad drain back valve in the pump, but this is less common than what I outlined above.(there are tests for this)

Posted on Jan 13, 2009

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