Fuel going into bank1 cat

Question

Just replaced bank 1 cat but cat looked orangy in color why.

Answer 1

Hi there

This could mean you have raw gas going into the converter. This is usually due to a misfire. The converter itself can also change colors without a misfire because of the extremely high temps it works at. If you don't have a misfire code it's likely nothing to worry about, however if the truck is due for a tune up it could be the problem.