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Thanks again for all of the great feedback.
Paul, to answer your question, after a 10 minute drive the idle dithers. Maybe 25 rpm or so, up and down at a roughly 1 second frequency....
In your opinion, am I wrong in assuming that the single wire narrow band 02 sensors' black wire (from the sensor to the connector pin) is unshielded ? And, if there is a shielding problem, it is between the pin connection and its path to the ECU ?
I am trying to understand why with a low warm CP (around 2.95 bar) and a .85 V 02 sensor signal (both indicating a rich mixture), the measured duty cycle of the FV is over 80% which as I understand it indicates the ECU trying to react to a LEAN mixture ? One thought I had was that the high 02 voltage was somehow being attenuated on its path from the connector to the ECU, and telling it to further richen the mixture ?
If I checked the connection at the ECU at the appropriate pin (number ?), should I be getting that same .85 V ? If not, and it is lower than .5 V, this would explain the inconsistency right ? I could then focus on that critical path.
Thanks as always,
Bill
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