PainterofCrap posted:

Valve timing is really the first thing you should do for a tune-up. They tighten up with use, and this can cause them to open early & the engine isn't smooth (I'm facing this same issue with the I6 in my Econoline - even though it has hydraulic lifters, the valves are adjustable, and I think they're tight - it runs in an oddly rough way).

After valve adjustment is the ignition timing. Only after these two are done should the idle mixture be adjusted.

drat that is the most goddamned photogenic car.