Alright sounds good so that lower intake seal will be the next project.Have never used a gasket on the front or rear of the lower intake. Good bead of RTV and let it skin up for about 30 min then install the intake.
If the EGR leaks smoke then the engine can suck air into it the same route which is unmetered are going into the intake.
Dang man I don’t know I put 4 different brand new egrs and every one of them leaked smoke. Is there anything I could spray on the egr while it’s running to see if it changes the idle?