1991 Ford Ranger truck diagnoses

80,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CHERYL NOST
  • MEMBER
  • 1 POST
engine idle goes up and down,sounds like a hesitation or miss,i put plugs and wires on also replaced the throttle position sensor.
Apr 20, 2010 at 12:51 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Try cleaning out the idle air control valve and EGR valve to include the MAF sensor.
Apr 21, 2010 at 5:39 AM
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