Gave my truck a tuneup- plugs, wires, cap, rotor, and all the filters. I did not reset the timing...I don't have a timing gun, or know how to use one. Truck runs better than it did...lost the hesitation it had, ~0.5 better mpg, and smoother on the road. I have noticed when sitting idling it runs pretty rough...enough to send a noticable vibration into the cab. Does it hot or cold. Do I need to put a timing gun on it, or something else??? Maybe its actually just running decent and I'm a confused pussy. It's a stock 305 i should add...and I checked for any vaccum leaks. PS My 700r4 is about to eat it.