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.

stumbling idle, occasional cutout

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Old 06-18-2009, 10:29 PM
  #1  
calgarynotch
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Default stumbling idle, occasional cutout

So whenever my car warms up it seems to get a really bad idle dipping up and down with stalling. Its really bad on fuel and doesn't seem to pull very good when its warm. I've replaced: coolant temp sensor, 3g alt, starter solenoid, cleaned entire intake, reset base idle, reset tps to .96, new o2 sensors, new rad, sometimes my alternator will intermitently charge and not charge...and sometimes if I hit a big bump the car will sputter...my codes are: KOEO:85,33 KOER:93,44,33. There is a line that comes off the head that's welded shut and I have no air pump. I have no emmisions where I live...please help me out. I want to soon run this car and see its full potential. Thanks
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Old 06-19-2009, 03:06 PM
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calgarynotch
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Anyone got any solutions?
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Old 06-19-2009, 09:03 PM
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mjr46
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perform the ford wiggle test = with car running go around and lightly tug and or wigglr wire harness and all connectors and see if you notice a difference it the way it runs when the prob area is wiggled
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Old 06-19-2009, 09:25 PM
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zebo87
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with what you are saying about the alternator the wiggle test is a must. also make sure the connections to the alternator and battery arent corroded. you could have a ground or short also.
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Old 06-20-2009, 03:47 PM
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calgarynotch
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Yeah all the charging system is new. I notice SOMETIMES the alt won't charge then I can smack the dash and it it will dip back up and then it will start to do its stupid wonky idle again. Its so tempermental on how it runs. It has some Heat soak power fade I noticed as well. Ill try the wiggle test. Any more suggestions would really help me. Gas is over 1.00 a litre again
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