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1994.5 - 1997 7.3L Power Stroke Diesel  

rough idle

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Old May 23, 2010 | 05:33 PM
  #1  
rulydog's Avatar
rulydog
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rough idle

any ideas why my 97 f350 is idling rough when coming to a stop? it stalls sometimes too! could it be something with the vaccum? brake booster?
 
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Old May 23, 2010 | 05:45 PM
  #2  
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F350-6
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From: Texas
Welcome to FTE. Any mods done to your truck? First thing to check is your engine oil. Is it full, not overdue for a change, and a diesel rated 15w-40?

How long has this been going on and was there any work done to it before it started happening? Does your check engine light come on when it idles rough? Try unplugging the ICP sensor while it's idling rough and see if it smooths out any.
 
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Old May 23, 2010 | 05:49 PM
  #3  
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Need to copy & paste this ...

Good post Chris...
 
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Old May 23, 2010 | 07:45 PM
  #4  
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From: Thomasville, GA
Check your fuel pressure at idle also. Should be between 50psi and 80psi. If it's lower it could contribute to the problem.

Changed the CPS at all?
 
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Old May 24, 2010 | 05:55 AM
  #5  
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48' fordster
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From: Standish ME
Just throwing it out there....could be injector O-rings. Look in your fuel bowl and see if there are any black particles in the fuel.
 
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