dude i have a 92 hatchback, and mine just started doing the same shit. When my speedometer acctually works it bounces like 10 mile an hour back and forth, then sometime's it will just go to zero and my odometer won't even turn. then when my car warm's up the check engine light will come on and it will idle at like 500 rpm's. WTF is wrong with my shit also????????????????? help please (sorry just thought we might have the same kind of problem.)