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November 12th, 2007, 05:43 PM
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#1 |
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Regular
1990 mustang gt
Join Date: Apr 2007
Posts: 54
 iTrader: 0 reviews
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Intake Backfiring
I HAVE A 90 MUSTANG WITH A LITTLE MODS DONE AND EVERYTIME I START IT UP IN THE MORNING IT WANTS TO STALL OUT AND WHEN I GO TO TAKE OFF IT STARTS BACKFIRING THOUGH THE INTAKE WONDERING WHAT IT IS. IF YOU CAN HELP PLEASE E-MAIL ME AT RYDENLOW88@AOL.COM
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November 12th, 2007, 05:48 PM
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#3 |
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Enthusiast
1987 Mustang LX
13.9@102.43
Join Date: Oct 2006
Location: Ephrata PA
Posts: 647
iTrader: 0 reviews
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Is the spark plugs in the correct order? Sounds like a misfire?
 the only thing i can think of is the timing may be off or your getting to much fuel.. what are your mods? have someone scan your computer chip for problems. My guess is a malfunctioning sensor
__________________
HONDA: Hold on, Not done Accelerating A girl's legs are her best friends, but the best of friends must part. LIVE Tag- foxbody87 
Last edited by 87foxbodylx; November 12th, 2007 at 05:50 PM. |
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November 12th, 2007, 05:52 PM
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#4 |
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all motor
92 coupe
9.94@136.40
Join Date: Dec 2006
Location: Chicago
Posts: 576
iTrader: 0 reviews
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you probly have the firing order wrong
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November 12th, 2007, 06:24 PM
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#5 |
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Hardcore Enthusiast
1990 GT
Join Date: Aug 2006
Location: dalzell, south carolina
Posts: 1,436
iTrader: 0 reviews
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it could be a bunch of things. check it for codes and let us know
__________________
1990 5.0 getting all fixed up for next season 2004 mustang gt 520rwhp, 491 trq sold 
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November 12th, 2007, 06:35 PM
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#6 |
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I Post Entirely Way Too Much
1996 Mustang GT
13.64@101mph
Join Date: Apr 2007
Location: Massachusetss
Posts: 5,828
iTrader: 1 reviews
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could be vaccum leak also..but prob firing order wrong, bad rotor...etc...
__________________
 1990 GT- GT40p Heads| Anderson N41 cam| Crane 1.6 RR's| Trickflow Intake|MGW Short Throw| Aluminum d/s| 3.73's.....still slow.... |
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November 12th, 2007, 08:43 PM
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#7 |
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Ask All My Baby's Mommas
Join Date: Jan 2007
Location: hampton va
Posts: 276
iTrader: 3 reviews
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i think its the timing. try to bump it up a bit. my car loves 14 degrees. good luck
__________________
hey chevy boy.....i got something for you to POWERSTROKE! Warning: surgeon general says its ok to smoke ricers! |
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November 12th, 2007, 08:57 PM
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#8 |
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MM Ninjas!
 
1990 Mustang LX
9.36@143 mph
Join Date: Jan 2006
Location: North Fond du Lac, Wisconsin
Posts: 11,375
 iTrader: 1 reviews
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Does it just do it when the engine is cold? What is the timing set at?
__________________
My daily driver has 16 cylinders and 4400hp @ 1000 rpm....  ***1988 Mustang GT - Stock....almost 
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November 12th, 2007, 09:27 PM
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#9 |
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Regular
1988 Mustang GT Vert
Join Date: Feb 2007
Location: Colonia, NJ
Posts: 401
iTrader: 0 reviews
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I also have the same problem, but mine only does it when the engine is cold.. is that normal? I gave the car a complete tune up, wires, rotor, cap, plugs, fuel filter, etc.. and it still does it
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November 12th, 2007, 10:01 PM
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#10 |
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Ask All My Baby's Mommas
Join Date: Jan 2007
Location: hampton va
Posts: 276
iTrader: 3 reviews
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mine only did it when it was cold but when i set it at 14 degrees, it ironed its self out
__________________
hey chevy boy.....i got something for you to POWERSTROKE! Warning: surgeon general says its ok to smoke ricers! |
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November 12th, 2007, 10:17 PM
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#11 |
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Regular
1988 Mustang GT Vert
Join Date: Feb 2007
Location: Colonia, NJ
Posts: 401
iTrader: 0 reviews
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mine does it when it's cold now and sometimes when its cold the rpm goes down about 4 mins in the warm it goes down likes its about to stall then up its nothing like the idle surge though I had that before...
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