5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

need some help with fuel pump...

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Old 07-16-2008, 10:00 PM
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90mustang325hp
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Default need some help with fuel pump...

I just installed a high flow perfomance fuel pump in my 1990 mustang gt and every once in a while when i hit the gas my car will bog down and not really pick up any speed then i simply let off the gas and stab it again and by the second or third time it's going fine. sometimes this will happen once a week or 5 times a day but only after i installed this bigger pump. do i need to put in bigger fuel inectors? can i install bigger injectors without changing maf and computer?
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Old 07-16-2008, 10:06 PM
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PRO50SC
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Default RE: need some help with fuel pump...

Well if it's doing since the install, I would suspect either the pump or your workmanship. You can't install bigger injectors w/o changing/recalibrating the mass air.
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