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ECU problem? - no closed loop? 900 1993

posted by  ronald on  Tue Nov 24 06:28 CST 2009
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last visit: Wed Oct 10 11:04 CST 2012
[RELATED]

Before admitting to a bad O2 sensor, I decided to disconnect it and see if some rough running problems would appear better without it. I disconnected both connectors and then disconnected the battery for a few minutes to clear the ECU. After driving the car for 10 minutes, I got no warning light, no codes and as far as I could tell, no closed loop operation. What's with this? I shut the car off and restarted it, still no codes. Idle was rough, like it was running rich. I reconnected the O2 sensor with the engine running and the idle smoothed out considerably. So I'm back to the drawing board again.

Help!

Ron

93 245
93 944 (new plugs, wires, cap, rotors, FPR, ECT ......)






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New ECU problem? - no closed loop? [900][1993]
posted by  ronald subscriber  on Tue Nov 24 06:28 CST 2009 >


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