Digital Dash on 84

Hello, Im experiencing something really weird on my Vette right now, after I was done changing my oil/oil filter, I started up to read the temp and the pressure gage, and I noticed that all of the dash gages, the whole display was going "crazy". I took it for a test drive, and it would stay normal when Im cruising, but when I accelerate or when I go over a speed bumb or bumpy road the dash starts doing the same thing again. Like if it was reseting by it self with the vibration or movement. It looks like a loose electrical conection somewhere, but I dont recall messing with nothing electrical. Or is it that just my dash is going bad? It was working prefectly fine untill I did the oil change. Any help or suggestions would be greatly appreciated. Thank you :)

Okay, I got it fixed, it was the conector of the O2 sensor, like if it wasnt making a good conection. I also noticed that when the dash was flickering, the idle speed of the engine was chaging as well, it would go up when flickering and back down when normal. I must have pulled the wire by accident when doing the oil change. Im glad its running okay now. Thanks a lot everybody. :)