My 92 PA had a similar problem. At low engine speeds it would shake pretty bad. It turned out to be the harmonic balancer. You can easily check this by looking at the front end of the engine. It is the pulley that drives all the belts. If the rubber has deteriorated, it could be the cause of your problem.
my buick century would die but only if i slowed down or stopped after about 3-4 miles....if was a spark sensor? that eventually was replaced?
Out of gas
There are a couple of reasons why the window won't go back up on a 1996 Buick Century. The window may be off track or the window motor has stopped working.
the catilatic converters could be stopped up.
Check blower motor fuse Check to see if compressor is working
Loose battery or alterator connections
well it needs to be serviced...soon
Low coolant? Bad sensor?
A head gasket leak. I had one, its not fun
You did not teach it the trick very good.
Buick Century was created in 1936.
The drain line for the cowl is stopped up or the windshield is leaking.