I have a 96 z with an auto. I recently changed the bank 1 o2 sensor, now my ses light comes on alot sooner than before. Is this a plugged cat? What code would it be? Short of replacing it, what are my other options if any? Also, after washing my car it runs like junk for about ten mins, what gives?

 

You need to find out what codes it is throwing to know what is wrong.Are you washing the engine compartment?.Prolly need new wires.