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raising the idle speed?
Posted 26 November 2003 - 07:40 PM
Posted 26 November 2003 - 07:41 PM
Posted 27 November 2003 - 07:49 AM
This, for future reference is the IAC valve (Idle Air Control valve).
Look on the passenger side of the throttle body just behind the can. In a recess sits a screw that also runs horizontal. This is the idle control.
The way the idle is controlled on fuel injected cars (turbos also) is to allow a small controlled vacuum leak. Not by adjusting how far the throttle plate is open as is the case on a carbed car.
This is mentioned for the sole reason that turning the screw anticlockwise raises the amount of the vacuum leak and thus increases the idle. (On a carbed car turning the idle speed adj screw this way lowers the idle)
Hope this helps, as you are correct- during the winter months, a slightly higher idle speed helps offset the battery drain caused by the heater blower, headlights and wipers all being used simultaniously at some times.
Note: the IAC valve controls the idle speed during warm up, but can affect the idle at all times if the internal shuttle sticks.
Posted 10 March 2004 - 09:32 PM
Yay for the search feature!
Now if only my eyes can use its search feature to find that screw...
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