After two years of providing great rides in these strange times, all of a sudden my 1989 XJ6 started acting up. At first it threw “Fueling Failure”, with a bit of engine misses, and then it grew bigger. There was a squeel, which I diagnosed as a waterpump issues, and replaced it. Used a chance to replace all the coolant hoses, did that last 15 years ago. Felt good doing it!!!
Now I have very rough idle at traffic light when engine in D, but not as much in N, but all fine at any RPM involving foot on the pedal. Replaced Oxygen sensor, but that cured nothing. Advice?