5.0L (1979-1995) MustangTechnical 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.
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Hello. I'm trying to install an adj. fuel pressure regulator on my speed density '88 GT because the idle pressure is sitting at 44-46psi, idles like s#@t, smells rich, and sometimes stalls when you come to a stop or put it in park. It runs awesome once you get rolling and at WOT though. I was thinking it needs to have the idle fuel pressure lowered to cure the problem, but I honestly don't see the stock FPR! Maybe I'm looking too hard, or just an idiot, but I don't see it. Any help would be appreciated!
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LUK=Let Us Know, GL=Good Luck, LMK=Let Me Know, JIC=Just In Case, BTSTDTRT=Been There Seen That Done That Repaired That, YCYDYP=Your Car Your Dough Your Prerogative and the classic... DILLIGAS=Do I Look Like I Give A S***
1986 GT-X303-289 heads-1.72 rockers-RG 4+1 Trans.
Originally Posted by Joel5.0
Great thoughts will overwhelm a feeble mind.
There is never money to do it right, but there's always money to do it over.
The proof of understanding is the ability to explain it. (H. Torruella)
if it is that rich, I doubt it is the FPR, when they fail, the preasure usually drops. It sounds like it is in open loop, so, look at your MAP sensor, a vacuum leak, or a pinched vacuum line. I have had both a FPR fail, and a MAP sensor fail.
my ex-wife asked me to sell my 86......my current wife bought me 24# injectors and a hood
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