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#1
10-07-2005, 09:23 PM
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Fuel Pump
88 f-150 5spd dual tanks, how do i tell which pump is goin out? when i start it it idols halfway decent, then when i give it gas it kinda dies then when i let off it kicks in. and i also have a backfire in my intake....what causes that? how can i fix it?
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#2
10-08-2005, 01:11 PM
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Re: Fuel Pump
First check that fuel filter.
A Fuel pressure gauge will test the pumps. The intank pumps are low pressure if it has a high pressure pump on the frame. The low pressure intank pumps will be around 5 lbs of pressure. Does it read the same pressure on either tank? Depending on engine you should see 40-60 lbs of fuel pressure at fuel rail.
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