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miss or stutter 5.3 4X4 (106K)

  #1  
Old 02-28-2011, 05:48 PM
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Default miss or stutter 5.3 4X4 (106K)

had a slight miss or stutter between 45 & 55 MPH when at steady speed. Time to change plugs and wires any way so I did it this weekend. Now miss is worse and also happens when accelorating easily in the same speed ranges. Any Ideas??????????
 
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Old 02-28-2011, 06:09 PM
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Are you getting any codes? Has the throttle body been cleaned recently, if not it is basically a free (besides a can of throttle body cleaner) preventative maintenance item.
 
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Old 02-28-2011, 06:27 PM
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no codes, no check engine
 
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Old 02-28-2011, 06:34 PM
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Then if you haven't already I would clean the throttle body real good along with the IAC (which is also in the throttle body) and see how it runs. If it still is not fixed I would start testing the sensors.
 
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Old 02-28-2011, 06:38 PM
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Like speed sensor, o2 sensor, coils etc.
 
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Old 02-28-2011, 06:42 PM
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excuse me for being stupid but what is the IAC???????
 
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Old 02-28-2011, 06:53 PM
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Idle Air Control Valve - it is screwed into the throttle body. Also a bad TPS (Throttle Position Sensor) could be going bad without throwing a code.
 
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Old 02-28-2011, 06:58 PM
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If I get some one to plug a computer into to it and make it duplicate the problem will that narrow it down possibly. I have a guy who has a shop and is pretty good but not cheap but I trust him!!!!!!!!!!
 
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Old 02-28-2011, 07:24 PM
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If he knows what values to look for then yes he should be able to determine the issue. Good luck!
 
  #10  
Old 02-28-2011, 07:26 PM
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thanks for your help shamrock
 
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