Quote:
Originally Posted by JimG
I pulled #1 plug and it looked worn and fouled, however #4 & 5 had broken center electrode ceramics. Signs of running rich with #6 looking the best. These plugs had only 70,000 miles on them I expected at lease 100K! So I just finished replacing all plugs, we'll see.
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What plug are you running? My NGKs (Platinum4) also have about 70,000 miles on them and started to randomly misfire, mostly on cylinders #3 and #6. The misfires only occur on startups (as far as I can tell). I'm going to swap them out tomorrow and have a look