thought i would start a new thread on this one... in the midst of looking at the oil light flickering in my previous post, i decided to take a look at the spark plugs... this is what i found...all 4 spark plugs are really black at the business end...dry, sooty like build-up...nothing wet...i checked them after the truck sit over night...would it be better to check them after i have driven it??? the threads were a little oily, but the end that sticks into the firing chamber was dry, black, sooty, with buildup...i could chip some of the black buildup off... what does this mean and what should my next step be... thanks...michael

I'm trying to fix it...how do I change out the switch without damaging anything else?