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.

HELP!!!!

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Old 03-13-2007, 08:22 PM
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93lxtacy
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Default HELP!!!!

I've gotta 93 5.0 and I just put a new stock computer from Autozone and a Holly 255 lph fuel pump on it. The problem is it will start but when you press the gas it lose fuel pressure. Do you think it could be the regulator!
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Old 03-13-2007, 08:45 PM
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Default RE: HELP!!!!

anybody?
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Old 03-13-2007, 08:49 PM
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PRO50SC
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Default RE: HELP!!!!

ORIGINAL: 93lxtacy

I've gotta 93 5.0 and I just put a new stock computer from Autozone and a Holly 255 lph fuel pump on it. The problem is it will start but when you press the gas it lose fuel pressure. Do you think it could be the regulator!
You've determined this how? What were the reasons for the new parts? How old is the fuel filter?
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Old 03-13-2007, 09:00 PM
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93lxtacy
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Default RE: HELP!!!!

AFuel pressure gauge. The fuel pump went out and my alternator fried my computer as well.
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Old 03-13-2007, 09:03 PM
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PRO50SC
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Default RE: HELP!!!!

Ok so what are you getting for a reading?
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Old 03-13-2007, 09:06 PM
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93lxtacy
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It goes all the way up to 40 and sits there like its suppose to. Then you hold the gas for little while and it drops to like 10 and starts to spudder. When let off it stops.
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Old 03-13-2007, 09:07 PM
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Goosepoop302
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Default RE: HELP!!!!

i have the same issue with mine right now, i have a 255 walbro pump and new injectors. shop said it jumped to like 24 or something and fell back
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