Originally posted by Dr. Isotope
So it shakes like that in gear, and not just at idle? If it shakes in neutral, it could be any number of easy fixes, from dirty TB to clogged air filter... but if it shakes in gear at those RPMs, it may unfortunately be something more serious.
I'm a keep-it-simple-stupid kinda guy-- check the simplest things first: air filter, spark plugs, cap and rotor-- lose a notch inside the dizzy cap and get shitty spark at low RPM, but pick it up above 1500rpm, and you think you're running fine-- shit like that happens to me all the time. Check belt tensions, etc. Don't go running off to the bastard mechanics until you've eliminated all other options... After all, a few hours with a wrench and screwdriver in your hands are basically free...
he covered it all!