1992 Pontiac Bonneville rough idle

Hello, im married with two kids trying to get through school and work, so I am on a tight budget, cant afford auto repairs so I take it on my self. Any help would be greatly app. I am trying to fix my 1992 bonneville, check engine light on obd said camshaft sensor failure replaced sensor, cleared codes started it up same problem same code. Codes did clear went in a loop rite after I started it back up? Any suggestions? Oh and it runs fine down the road just stumbles at an idle and almost dies sometimes does but always starts right back up. Thank you for your time its greatly app. Chuck