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Old 09-15-2003, 10:07 AM
sbourg sbourg is offline
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
In the KE controller, idle speed is by closed-loop monitoring of engine speed via a sensor. However, mixture is also controlled, and the loop there is mechanical and electrical. Any vacuum leaks will bypass the airflow sensor and cause an overly lean mixture. This is monitored by the O2 sensor, and the controller will compensate with the EHA to keep the engine running. Mixture control probably takes priority over idle speed control, so I would look for faults here first.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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