1994 corsica?

Needs tuned up..spark plugs and spark plug wires may help or even fix this problem,........ rotor-cap and rotor button will help , too!

if you seem to have less power than normally. you probaly have a misfiring cylinder or bad feul injector. either that or your engine mount is loose. the first thing i would do is run the engine and look at it. if it shakes rapidly from side to side check your mounts. if it just shakes all over but it seems to be to a rythm grab a pair of rubber long handled pliers or channellocks work best and while the car is running pull the spark plug wires off one at a time and touch them to the engine for a second. if you hear/see the spark then reconect it. if you dont get a spark then the wire is bad. if all the wires are good then turn the car off and take out the spark plugs themselves and se if any of them are very wet. if so its not getting any spark inside and the plug is bad. if you have a heat testing gun run the engine for a few minutes in idle and then point the gun at the base of the spark plug. the tempetures should be within 50 degrees of eachother. if any of them are running really low in temp then you have no spark which would lead to result in a plugged or just plain dead injector. then you could do a voltage test on the injectors themselves to se if they really are bad at all.

The shake is your front rotors you can have them turned down at Midas if they are not to far gone,it's like$8 a rotor.Take your tires off (front) take the rotors off and have someone give you a ride,DON'T DROP THE BERRINGS IN THE DIRT,or just replace them while your at it.If they are to far gone to be turned then you gotta get new ones.

You have a rough idle. Adjust it, clean your intake, check your fuel filter, check spark plugs, and check air filter. But worse come to worse you got a clogged catalytic converter. You can steam the cat to blow out the carbon or you just replace it.

The person above me is correct, it is a break problem. Most likely your front roters. Don't bother getting them turned. Go buy new ones... pads too while you're at it. Your front breaks do most of the work.

TRY FINDING AN INDEPENDENT SHOP INSTEAD OF THE DEALER OR A CHAIN STORE BECAUSE YOU WILL BE OVERALL MORE PLEASED WITH THE FINDINGS AND THE SERVICE.

LEAVE IT THERE WITH THEM SO THAT THEY CAN FIND THE PROBLEM FOR YOU, IT WILL BE A LOT BETTER THAN JUST REPLACING PART AFTER PART AND NOT DOING ANY GOOD.