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Idle Problem Diagnosis 200 1991

SUCCESS. O2 sensor installed and now getting readings varying across the full range. No codes and smooth idle with 50+ miles since sensor installed. Thanks to all! FWIW, I used the shorter 02 socket from the loaner set at AUTOZONE. The had one with the handle attached, but it looked wimpy, so opted for the set with three sockets instead. Sprayed PB blaster two days before and heated with MAP guess for a minute or so to break it free,then applied Kroil and rocked it back and forth applying more Kroil. It came out fine with no need to chase the threads before installing the new one.






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