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.

ENGINE RUNNING A LITTLE ROUGH!

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Old Dec 24, 2005 | 09:09 PM
  #1  
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Default ENGINE RUNNING A LITTLE ROUGH!

I JUST CHANGED MY FUEL INJECTORS FROM 42LB TO 30LB A RECALIBRATED MY AIR MASS THROUHG PROFESSIONAL MASS AIR SYSTEMS FOR 30LB INJECTORS! I ALSO TUNNED UO THE CAR WITH MOTOR CRAFT SPARK PLUGS GAPPED AT 0.53 AND I AM RUNNING A 6AL BOX WITH MSD TFI COIL. I AM ALSO USING MSD SUPER CONDUCTERS WITH THIS SET UP. I HAVE A 80MM MAS AIR WITH ANDERSON POWER PIPE. WITH ALL THAT TO SAY. THE PROBLEM I AM HAVING IS AFTER WARM UP MY CAR SEMMS TO PULL SOME WHAT MORE LIKE A HESITATION. I DO NOT KNOE WHY? ANY SUGGESTIONS. THXS
Old Dec 24, 2005 | 10:56 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

stop yelling at me!
Old Dec 24, 2005 | 11:02 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

WHAT THE F--- ARE YOU TALKING ABOUT? KNOW ONE IS YELLING AT YOU!
Old Dec 24, 2005 | 11:09 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

ORIGINAL: dropstang

WHAT THE F--- ARE YOU TALKING ABOUT? KNOW ONE IS YELLING AT YOU!
stop with the caps
Old Dec 24, 2005 | 11:16 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

Old Dec 24, 2005 | 11:32 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

one question is why did you have 42# to begin with?

also lose the caps, caps are yelling
Old Dec 25, 2005 | 01:21 AM
  #7  
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

Did you reset your computer after the calibration? Is it running rough like it's missing? or is it just hesitating when you give it gas. More details would be helpful
Old Dec 25, 2005 | 07:14 PM
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

what setup are you running?
Old Dec 26, 2005 | 12:20 AM
  #9  
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Default RE: ENGINE RUNNING A LITTLE ROUGH!

sorry about the caps. i was running 42lbs beacuse at one point is was super charged. when i got it i did not know much about fuel injections. also, i never reset the computer. how do you do that? can you do that by disconnecting the batttery? or do you have to do from the computer? the hesitation im feeling is more when i accelerate not at idle.
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