1991 Ford Explorer idle

80,000 MILES • 6 CYL • 4WD • AUTOMATIC
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RCWILSON312
  • MEMBER
  • 1 POST
when at a light, it will idle ok, then the idle goes up and down, like it wants to race the car next to it, (humping the road)
Aug 29, 2009 at 3:41 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the idle air bypass valve, TPS and MAF sensors to include the EGR valve.
Aug 29, 2009 at 3:46 PM
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