1984 Chrysler 5th Avenue Engine Running to Rich and will no

I took the EGR valve Off The Intake and started the engine and seemed to run ther same without it even there The Intake Must Be clogged With carbon. Is There any way Of cleaning the carbon out without totally taking off the intake Manafold.
Would this cause the motor to run real rich?
I Replaced The Oxygen Sensor, did not change anything. I still smell rich gas fumes especially at idle

Thank You Bill