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Ful pump installed and truck will not start - Sierra 1500 GMC Cars & Trucks

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What probably happened is maybe your fuel cut off switch engaged and cut off your fuel going to the motor as a built in safety feature. check that. also check your fuel pressure in the motor and see if enough pounds of fuel pressure is squirting through to the fuel rail and if not check your filters which may be clogged and not be allowing fuel to pass thru the line to the motor. last but not least check the ecm Brain computer. maybe it is sending the wrong commands to fuel pump and maybe memory has been lost in ecm.

Posted on Jul 26, 2009

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Posted on Jan 02, 2017

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It over heats put a new ful pump in it but will not start


Check coolant level for the overheating issue. If level is ok, possible thermostat problem/possible rad fan problem/possible restriction in rad/possible head gasket. Why did you change the fuel pump? Is there power and ground to the fuel pump for it to operate? Have you checked for spark at the spark plugs?

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Fuel pump issue... no, it seems to be your immobiliser. They are programed to turn off the fuel pump in order to stop thiefs stealing cars. The immobilizer unit is on the fritz and may need to be replaced. I would change it to the company "Black Widow". they make good stuff and all wiring is black so it is harder for thieves to steal your car.

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Hi Lamont
is fuel getting up is fuel pump ok ?disconnect hose by engine just to test pump but b care ful let fuel collect in jar don't want any fires also first u might like to check fuse

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1 Answer

Have a 1995 Mercury Villager that wont start have replaced the starter battery cables switch what else can it be please help.


try spraying starting fluid in air intake or throttle body. If it starts, it is a fuel problem. Can you hear ful pump run for 5 seconds when you turn key on? Pump is in tank.

go here too

http://groups.yahoo.com/group/villagerquest/

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1 Answer

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if you have fitted a new fuel pump it will more than lickly need coding to your car which means taking to a dealer

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