94 pa rough idle

the car idles rough all the time at idle but when cruising the car seems to run fine also when i come to a stop after cruising it idles rough and then bogs down lights dim oil pressure drops voltmeter drops then kicks back up and just idles rough again i changed the altenator spark plugs wires coil packs fuel filter cleaned battery terminals i have no idea what else to do

Any codes?

I would remove and clean the T-Body, paying special attention to the IAC Valve. I would also clean the MAF sensor.
Tim

thanks tried it and still did nothing no worries though my lady is getting a new car not my problem anymore thanks alot though i truly appreciate your help