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311 OBD Code 200 1991

posted by  pageda on  Wed Jun 3 08:16 CST 2015
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last visit: Fri Oct 24 13:18 CST 2014
[RELATED]

Rechecked O2 sensor and it was fluctuating between .2 and .9 volts so it's OK

After a couple days of use no codes reappeared.

This AM car started, backed out of the driveway, stalled and would not restart.

No spark, swapped the fuel relay no go. I was going to swap the power stage out but decided it was quicker to try the ECU first, and it fired right up. Apparently dead 951 ECU. I have had one or two of these fail over the years so I am not too surprised.

My wife went across town and reports it is running fine with no missing or chugging as it was previously doing. Hopefully it's back to a reliable runner just like the other 3 I have.

Dan






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