Question about 1991 Chevrolet S-10
My 1991 chevy s10 failed emissions 4.3 engine has had a new oxygen sensor spark plugs.throttle body sprayed.failed with high co and hc readings both high.any ideas?
Have your cat. converter checked out. I just had one of these for the same reason in my shop today.
Posted on Jul 09, 2008
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Posted on Jan 02, 2017
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