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1990 Ford F-250 Custom 5.8L High Idle Speed
Posted to Ford Driveability on 2/22/2004 17 Replies

Hi Ford techs: Have an intermittent situation where the idle speed will flare up on its own to almost 3,000rpm's and stay there. Then, drive for a bit, and it will idle normal. continue to idle, and idle will surge after 5-10 min. of idling, not to 3k, but [.....

17 Replies Received (View Replies)

  Related Documents & Media  1990 Ford F-250 Custom

 
Message Closed w/FIX

car Vehicle Data

1990 Ford F-250 Custom

VIN 1FTHX26H8L
Engine5.8 L / 8 cyl / GAS
Trans5-speed Standard
DeliveryFI
SymptomsHigh Idle Speed
OccursHot, Idle, After a Hot Soak, Intermittently
Misc.Lifted 4X4

Trouble Codes

21coolant temp signal problem
24intake air temp out of range
Message Closed w/FIX

car Vehicle Data

1990 Ford F-250 Custom

VIN 1FTHX26H8L
Engine5.8 L / 8 cyl / GAS
Trans5-speed Standard
DeliveryFI
SymptomsHigh Idle Speed
OccursHot, Idle, After a Hot Soak, Intermittently
Misc.Lifted 4X4

Trouble Codes

21coolant temp signal problem
24intake air temp out of range