1993 Marquis misfires at idle and sputters under acceleration
 

So I'm working on a 1993 Lincoln marquis with the sohc 4.6l ford. At first it was overheating so I took off the intake and replaced the egr valve. Well now I'm thinking that I missed hooking something up because it misfires at idle and under acceleration it sputters. I pulled out the spark plugs and they seemed to be running lean. The overheating problem is solved though. Any input that anyone has would be greatly appreciated Thank you for your time