Mechanics

WHAT PART IS LEFT TO CHANGE??

Jaguar XJS

Hi folks; thanks for the help you give.

I have a 1995 XJS - 4.0L AJ16 - 90,000 miles.

MY muffler guy says one of my cats is beginning to show early signs of blockage. I have changed the plugs, fuel filter, and had the throttle body and fuel system cleaned. I feel a random and inpersistant rough idle and my mileage is not what others get with this car. I get codes P0420 and P0430. Do I have a bad coil (there are 6 coils), a bad O2 sensor, a bad/dirty MAF, or bad injector? At running speeds, I notice no roughness or hesitation. Thanks for the advice. PS, any way to home test the items?
Avatar
Jimbeaux
May 16, 2007.



Hello, the two codes you have are catalyst effeciency codes. The mean yes the catalyst are going bad and it is nessesary to replace.

Tiny
Fstranger302
Nov 16, 2007.