Idle Control Valve
Idle Control Valve
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Yes.
The IAC is a very important part to the operation of cold starts , hot starts, load takeup control for A/C, lighting and power steering loads changes plus deccellertion close down..
To do the relearn the quickest way, disconnect one led from the battery for a few miniutes as enough time for the computer to lose all stored changes to it's operating tables.
Reconnect and do a 'cold' start, turning lights on and A/C/heat/fan etc for max cold loading while recharging the battery.
Motor should go to a high idle then come down to normal idle as heat builds.
Let fully heat then do a drive about 5 miles out and back.
Do a couple hot restarts to load the motor with battery recharge load.
If there are no other faults, starting and running under all conditions should be perfect.
The procedure will have made the PCM handle all the loading it would normally see in this short time and continue to fine adjust over time..
Good luck.
The IAC is a very important part to the operation of cold starts , hot starts, load takeup control for A/C, lighting and power steering loads changes plus deccellertion close down..
To do the relearn the quickest way, disconnect one led from the battery for a few miniutes as enough time for the computer to lose all stored changes to it's operating tables.
Reconnect and do a 'cold' start, turning lights on and A/C/heat/fan etc for max cold loading while recharging the battery.
Motor should go to a high idle then come down to normal idle as heat builds.
Let fully heat then do a drive about 5 miles out and back.
Do a couple hot restarts to load the motor with battery recharge load.
If there are no other faults, starting and running under all conditions should be perfect.
The procedure will have made the PCM handle all the loading it would normally see in this short time and continue to fine adjust over time..
Good luck.
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hemicbx
1987 - 1996 F150 & Larger F-Series Trucks
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Jan 10, 2003 10:19 AM
