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Discussing running really rich in the 5.0 Mustangs Forum. i have a 90 fox with a little bit of things done and wondering why ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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September 30th, 2007, 09:46 PM
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#1 |
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Look Ma! My First Post!
Join Date: Sep 2007
Location: baltimore
Posts: 1
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running really rich
i have a 90 fox with a little bit of things done and wondering why it is running so rich and also why in the morning it pops and backfires through the intake but once warms up runs fine.
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September 30th, 2007, 09:47 PM
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#2 | |
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I'm your huckleberry
Join Date: Jun 2006
Location: Bowling Green, KY
Posts: 3,775
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do you have an adjustable fuel pressure regulator?
What is your setup? I assume it is fuel injected right? You say a few things done to it, what size injectors are you running?
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 MM Sapper Squad
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September 30th, 2007, 10:06 PM
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#3 |
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MM Fanatic
Join Date: May 2007
Location: Bloomington, IL
Posts: 3,654
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Check codes, maybe time to check the timing and O2 sensors, clean the MAF.
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89 LX 515 hp 497 ftlbs 11.3 @ 125 mph 88 GT 11.4 @ 118 
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September 30th, 2007, 11:39 PM
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#4 |
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Enthusiast
93 GT Hatch
12.68@112.57
Join Date: Jun 2007
Location: Brandon, FL
Posts: 536
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i had the same exact thing wrong almost identical, its the timing big time. after i got my head job the timing was set at about 6* and needed to be set at 12*, fixed it right up.
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October 5th, 2007, 07:30 PM
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#5 |
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Newbie
Join Date: Oct 2007
Posts: 5
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problems
yea check your o2's, and mabey idle air control? and your codes.
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