I would like to adjust the valves on my p/u, but I have a few questions. I know that you have to do them hot. To do the adjustment should you set each piston at top dead center and then adjust or number 1 at tdp? The truck is idleling a little rough and I noticed that I don't have much power lately. It only has 95,000 miles on the engine dont burn oil at all. I did a complete tune-up last weekend, plugs, wires, rotor, and cap. Gas mileage increased from 18 to 24mpg, thats better but would like now to adjust the valves to try to see if that smooths out idle and helps with power. Thanks for any help.