just in the past week or so, the speedometer will drop to below zero, the check engine light comes on, the radio does funky stuff, and occasionally the car will just die. does this sound like a bad computer?
sounds like a bad problem in ignition switch or other common wiring point for all of these devices.
May want to stop by introduce yourself and you would get answers faster
A wiggle test candidate. - Stay away from moving parts when you do it.
Your first problem and main problem is that it is a buick... Personally I hate the early 1990's buicks I had a skylark :cussing: that gave me trouble after trouble. but as fair as what is actualy going on, do as tbaxleyjr says and check all the fuses and relays there might be something lose.
I had a 1990 Skylark with a 2.5L L4 - It gave me no trouble at all. I am acquiring a 1990 century in the near future to tinker on.