1991 Dodge B250 van with 5.2 failed CA smog HC test but only at the 15mph part
New cat 20K miles ago it runs great ,tuned up about the same time, I did the water pump , radiator and 160 degree T- stat as well. The temp gauge never goes up like it use to. Is it running to cold for the computer ? it runs just fine. I drove it up the freeway before taking it in and let ti idle 45 minutes while waiting for my turn.
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