Question about 1991 Buick Park Avenue
Posted by Anonymous on
Pull the 02 sensor and do a back pressure test on the catylitic convertor and make sure that you are getting too much back pressure. If you are, you will need to replace it, and see why it failed since they never go bad, they are killed by missfires.
Posted on Jul 24, 2010
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Posted on Jan 02, 2017
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