1991 Ford F150 idles to fast

1991 FORD F-150
14,450 MILES • V8 • 2WD • AUTOMATIC
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JACKWYATT
  • MEMBER
  • 1 POST
I have changed out the Idle air control valve,Throttle position sensor and Manifold absolute pressure senor to try and fix the fast idle but it has not fixed the problem. It idles in neutral at 1200 to 1800rpms and in gear it idles at 900 to 1200rpms.
Nov 23, 2009 at 7:15 AM
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OBXAUTOMEDIC
  • ✓Experienced Mechanic
  • 3,711 POSTS
Hi Jack,

Have you checked for Vacuum Leaks. Look for braken, cracked and colapsed lines. Also check the air intake hose for same and that the clamps are tight.


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Nov 23, 2009 at 9:08 AM
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