1990 Ford F150 Idle speed is not steady

1990 FORD F-150
109,000 MILES • V8 • 2WD • MANUAL
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GABEKARR
  • MEMBER
  • 1 POST
This truck is fuel injected and the the idle speed occilates between about 900-1200rpm when warm. Can you tell me what controls the idle speed and how to fix it.
Jul 16, 2010 at 1:43 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
If the check engine light is on have the computer scanned. If it isn't check the idle air control valve and the trottle position sensor.

Let me know what you find.

Joe
Jul 16, 2010 at 2:02 PM
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