shaking

smoke is coming out of the tail pipe? Does anyone have an ideas what is wrong?

i recently changed my spark plugs but after a few days my car start shaking when i'm at the stop light what could it be????

i have a 99 ford e350 van with a 7.3 diesel. it has a little over 200,000 miles on it and it shakes and vibrates the entire van at idle, give it a little gas and it smooths out. dirty fuel injector maybe? it is a one owner, bought new so it has always been maintained, so what could be wrong with...

I have a 97 Ford Taurus that drives fine but shakes when in park or while braking. Since it started we have changed the air filter, spark plugs, and used fuel injector cleaners,since that was recommended to me, but it has not solved the problem. Anyone know what it is? I am about to take a 500...