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The idle is not adjustible. You may need to clean the throttle plate to improve the idle.



You don't, It is totally controlled by the PCM using the IAC valve.



Turn the Idle Adjusting screw.


Computer controlled? Not adjustable


There should be an idle screw right by or under your throttle


on top of the upper intake there is a screw. it can be used to adjust idle speed.


You can't - it's all controlled from the PCM.


Idle speed is set by the PCM and IS NOT ADJUSTABLE.


check pcv hose elbow for vacuum leak.


All Ford vehicles cannot adjust idle nor timing wich is pre-set at the factory and the computer sets the idle and timing, vehicles after 1990 no longer can be adjusted.


It is not adjustable, and is sealed from the factory and is not to be fulled with. You have another problem that is making you think idle needs adjusted.


Trouble code P1506 means: Idle Air Control Overspeed Error


Trouble code P1506 means: Idle Air Control Overspeed Error


Idle speed is set by the PCM and is not adjustable. The screw you are fiddling with is just the stop screw to adjust the initial throttle plate position, it should not be used to attempt to adjust the idle.


May be computer controlled and not adjustable


Adjust idle on Mitsubishi diamante



Trouble code P1506 means: Idle Air Control Overspeed Error


It could be the Idle Air Control (Idle speed control) valve. Its located on the left side of your TBI and has an electrical connection.


Trouble code P1507 means: Idle air control (IAC) underspeed error




you can adjust it via the idle control valve.



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