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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

CRAZY IDLE ??

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Old Oct 12, 2010 | 05:02 PM
  #1  
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From: bethel ct
CRAZY IDLE ??

HI ALL:
PUT A 93 5.8 IN MY 92 F-150 THAT HAD A 5.0 GO SOUTH, IT'S BEEN RUNNING GOOD UNTIL LATELY.......THE IDLE HAS BEEN GOING ALL OVER THE PLACE, MOSTLY UP. I REPLACED THE IDLE ACTUATOR VALVE, IT WAS RUNNING OK, FOR A COUPLE WEEKS BUT NOW THE THING JUST WANTS TO RACE, THE IDLE STAYS UP AROUND 2,000 RPMS. ANY IDEAS WHAT ELSE COULD CAUSE THIS
THANKS IN ADVANCE
SCOTT

IF I DISCONNECT THE IDLE CONTROL VALVE, THERE IS NO MORE IRATIC IDLE BUT IT STAYS REAL LOW?????
 
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Old Oct 12, 2010 | 05:31 PM
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From: Des Moines
Check thoroughly for vacuum leaks.
 
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Old Oct 13, 2010 | 08:49 AM
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Also check the throttle cable and the throttle body.
 
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Old Oct 13, 2010 | 10:25 AM
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From: bethel ct
IF I DISCONNECT THE IDLE CONTROL VALVE, THERE IS NO MORE IRATIC IDLE BUT IT STAYS REAL LOW?????
 
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Old Oct 14, 2010 | 02:08 AM
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I would think that would indicate that the IAC valve is not sticking then.
 
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Old Oct 14, 2010 | 06:33 AM
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Like I said, check thoroughly for vacuum leaks.
 
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