What causes the catalytic converters to go out after I had them replaced over a year ago
I had my truck at a dealer last year because while driving
the vehicle would just shut off , they told me the reason
was the cats were bad and needed replaced and the cause
of that was the fuel pump mixing the fuel to rich . In just
over a year after getting new cars it started acting up again
. Once again they're telling me I need to get them replaced
again because they are burnt out on the inside . What could
be causing this to keep going on