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Still can't figure it out...

posted by  Don Foster on  Wed Jul 24 01:52 CST 2002
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last visit: Sun Oct 5 11:53 CST 2014
[RELATED]

Another thing that can cause the "overly rich" symptoms -- sorry I didn't mention it before -- is a failed engine temperature sensor, bad wiring to it, or a bad connection in the sensor circuit. This sensor is the FI ecu sensor, a two-wire device mounted about under intake header #3. (The one-wire sensor under header #2 is for the gauge and not connected to the FI system.)

If the resistance climbs very high, as happens when a connector or connections fails, then the FI systems interprets the engine temp as stone cold, about minus a zillion degrees, and pours in the fuel to compensate.
--
Don Foster (near Cape Cod, MA)






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