Rich Idle (cross post)
- Thread starter Mark
- Start date
Well...
At idle, the throttle position switch tells the ECU to ignore O2 sensor input, so the mixture is determined roughly by the CO% adjustment screw on the AFM, and the Temp Sensor II in the coolant mixture. Test the sensor, and know that a bad ground or two at the cam tower will cause a richer mixture.
(also posted to your post on Lancisti)
At idle, the throttle position switch tells the ECU to ignore O2 sensor input, so the mixture is determined roughly by the CO% adjustment screw on the AFM, and the Temp Sensor II in the coolant mixture. Test the sensor, and know that a bad ground or two at the cam tower will cause a richer mixture.
(also posted to your post on Lancisti)