I live in California and must get Smog Checks done every two years in order to renew our registrations. I took my wife’s 1990 XJ-S convertible (5.3L V12 w/ Marelli ignition) in for its Smog Check yesterday and for the ninth consecutive time it passed with excellent results.
Yesterday’s results at 133K miles were as good if not better than the results from the previous four Smog Checks.
I purchased this car in January 2005 from a used car lot in Phoenix, AZ with 62K miles on it. Unfortunately, it failed CA Smog Check at the Gross Polluter level when I got it home. It had suffered a Marelli meltdown under prior ownership with the two right side catalytic converters melted and destroyed internally. The catalyst debris was in the right side mufflers. I removed and replaced the failed right side catalytic converters myself along with plugs, wires, distributor cap and rotor, belts, hoses, etc. Then in July 2005 it passed the CA Smog Check for the first of nine consecutive passes with excellent results. The technician yesterday remarked about how low the emissions were for a 30 year old car with 133K miles.