Just did the plugs at 16K, what a jack ass I am for not doing it sooner. I have much more power and better mpg's. You loose power so slowly you don't realize it's gone.
I am gonna change my plugs @ 8K from now on!.
Oh yeah I did replace one plug at a time just to avoid the possibility of dropping something into the cyl. I did have a bit of a hassle getting #1 wire off but no other problems
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