Anyone running 280 cams without P0300 code?
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Go back to a 7 heat range plug and make sure that its protuding to. The colder the plug and the more removed from the chamber the higher the chance of a missfire. You might want to separate the cam centres too - might give you a bit more dynamic compression.
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From: Land of 10,000 Lakes
Try using a plug without the protruding tip. I havent gotten a P0300 in I cant remember how long now. Go with BR7ES or BR8ES. These work way better in my car than the protruding tipped plugs
with 280 cams you might want to try the bpr9es heat range plugs or go with the hks m45i which is the same heat range but a little bit cheaper that the ngk's. that way a lot more heat with escape the chamber and you wont have as much det/misfires from plugs going out of wack on you.
Do not switch to 9 range plugs. If anything, warmer range plugs would improve ignition, not colder.
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From: Land of 10,000 Lakes
So far, almost 2 weeks and no code 
. It would always come back after a day or two after clearing it in the past. I'm not sure if switching the plugs did it or adding more fuel and more timing at idle or both. I hope it stays gone permanent.
. It would always come back after a day or two after clearing it in the past. I'm not sure if switching the plugs did it or adding more fuel and more timing at idle or both. I hope it stays gone permanent.
