[darkpuppet]

I doubt it's vapour lock... since that was typically caused by fuel vapour affecting the pump operation. And since your pump is submersed (like all modern pumps), you should be fine there.

If the car is warm, and you're having trouble starting, it could be IAC, MAF, and/or TPS issue (most likely IAC, or MAF). I'd try cleaning your MAF and maybe getting your IAC checked... some datalogging of your MAF counts and IAC when cold and when warm would help narrow down the issue.. since it sounds like the car isn't getting the right amount of air when warm.

What kind of exhaust do you get when you start from warm? I'd expect a little bit of exhaust fumes -- might smell slightly rich, but should definitely not burn black. If nothing is coming out, it might be a lean condition at warm startup.

As for the wobbly wheels, put it up on a jack, and give the wheel a wiggle while watching for which parts are shaking loose. It could also be an unbalanced wheel, but if you hear a thrumming noise, it's likely a wheel bearing (common in the older focuses IIRC).

hope that helps.