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November 28th, 2010, 10:30 PM
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#1 |
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Newbie
1991 Mustang GT
Join Date: Nov 2010
Location: UTAH!
Posts: 8
 iTrader: 0 reviews
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4500rpm cutout?
i'm a new member. i got a 91 5.0 with a aod. Its just got a cheap intake and b&m shifter and full mac exhaust for now, but, when it his about 4000-4500 rpms it starts cutting out really bad and falls flat on its face. if i ease into it real real easy itll be fine. but if it gets stomped its goin nowhere, any help would be appreciated!
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November 28th, 2010, 10:40 PM
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#2 |
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Regular
Join Date: Dec 2009
Posts: 196
iTrader: 0 reviews
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fuel filter maybe ?
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November 28th, 2010, 10:59 PM
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#3 |
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Newbie
1991 Mustang GT
Join Date: Nov 2010
Location: UTAH!
Posts: 8
iTrader: 0 reviews
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has a brand new filter & pump,
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November 28th, 2010, 11:02 PM
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#4 |
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Enthusiast
2006 GT
11.99@114
Join Date: Sep 2006
Location: Orlando, FL.
Posts: 802
iTrader: 0 reviews
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Idk why the hell anyone suggest that.... My car just did this. It wasn't the ignition module (tfi) it was pick up sensor in the distributor.
__________________
 2006 GT (Fastest) 2004 COBRA (Faster) 1990 LX 5.0 (Fast) |
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November 28th, 2010, 11:17 PM
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#5 |
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I Post Entirely Way Too Much
1991 Ford Mustang GT
Join Date: May 2007
Location: San Diego, California
Posts: 6,063
iTrader: 0 reviews
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check your fuel pressure that will give you an idea if its your fuel pump. an as for your fuel filter its only 8 bucks so thats a cheap thing to try
__________________
 DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears |
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November 28th, 2010, 11:27 PM
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#6 |
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Newbie
1991 Mustang GT
Join Date: Nov 2010
Location: UTAH!
Posts: 8
iTrader: 0 reviews
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those were the first things i did at the beginning of last month, the car was sittin for almost three years before the owner before me. he just got it running. not good. but running. i thought it might be injector related?
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November 28th, 2010, 11:41 PM
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#7 |
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I Post Entirely Way Too Much
1991 Ford Mustang GT
Join Date: May 2007
Location: San Diego, California
Posts: 6,063
iTrader: 0 reviews
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did you do a tune up ? plugs, wiers, cap and rotor, check your timing. what was your fuel pressure ?
__________________
DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears |
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November 29th, 2010, 12:19 AM
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#8 |
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Newbie
1991 Mustang GT
Join Date: Nov 2010
Location: UTAH!
Posts: 8
iTrader: 0 reviews
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did that. didnt check timing. dont remember the pressure honestly, i can check it again tomorrow, what should it be at abouts?
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November 29th, 2010, 12:42 AM
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#9 |
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I Post Entirely Way Too Much
1991 Ford Mustang GT
Join Date: May 2007
Location: San Diego, California
Posts: 6,063
iTrader: 0 reviews
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35-40 i think
__________________
DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears |
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November 29th, 2010, 12:53 AM
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#10 |
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Newbie
1989 Foxbody LX Notchback
11.67 @121.4
Join Date: Nov 2010
Location: Bowdon, GA
Posts: 11
iTrader: 0 reviews
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The first thing I would do is a base idle setting. Doing this will get you throttle body, throttle position sensor, and timing where it wants to be. I had a 95 gt that did the same thing. I bought it running but with a spun rod bearing. After the crank and new bearings install, it ran like shit after 3800 rpm. I finally did a base idle and it now pulls hard all the way through the tach.
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November 29th, 2010, 01:09 AM
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#11 |
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Newbie
1991 Mustang GT
Join Date: Nov 2010
Location: UTAH!
Posts: 8
iTrader: 0 reviews
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and how do you do that?
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November 29th, 2010, 10:10 AM
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#12 |
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I Post Entirely Way Too Much
1993 5.ohhhh
12.97 @140mph
Join Date: Apr 2006
Location: Gatorland
Posts: 6,122
iTrader: 3 reviews
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Theres a sticky. Does the car ever shut off when driving for pro-longed periods of time?
__________________
02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed  --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100-- 
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November 29th, 2010, 10:15 AM
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#13 |
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Regular
1994 GT
11.75@120
Join Date: Mar 2008
Location: Pennsburg
Posts: 164
iTrader: 0 reviews
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Sounds like a timing issue. My car did the same thing when the timing was super retarded, id set base timing and give it a shot. The computer adjusts the timing depending with the vacumm so maybe thats why it does it, unless your really easy on it and the computer see's alot of vacumm????
__________________
 Ford Racing R block stroked 347. Trickflow stage 1 cam, Trickflow street burner upper and lower, gt40P heads, BBk 75mmTB, 03 cobra MAF, Zex dry kit, Tuned by PSI Motorsports, stock valve covers ...E/T: 11.75 @ 120mph 2.0 60foot |
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