Well I decide to change a coil and change the plugs this afternoon and what a suprise. I had 3 different plugs on bank # 2! 3 Bosch, 2 with different style numbers and 1 NGK Iridium. Researched the plug numbers and they were all designed to fit XK8. I have seen some blank-blank- blank B S in my time but this took the cake. Oh did I forget, one plug was finger tit. Now I wonder if the coil is bad or not! Well Let see what tomorrow holds when I change the plugs on bank #1. The interest thing is the coil that I changed is one that the dealer change 3 years ago when the wife and I were on a trip. For you folks that do not perform your own maintenance, ask your indy for the parts that have been changed. Its time for a cocktail. Jim

 

All went well on the bank#1 all the plugs were the same. The old girl is performing better than expected. Jim

 

good to see no more surprises for you and she's running great.

 

Jim,

Good to hear that. I hope the car is running better too.

This is a perfect example of the reason why I carry out the full service schedule list when I get a new (to me) vehicle to get a baseline and correct any 'mistakes'. Amazing the number of times I've found something not right from a leaking drain plug through to a seized spark plug. A mixture of plugs is one I've not seen yet!

Graham

 

Mixed plugs may be a direct result of the updated diversity regulations....