Pulled Codes

Codes 81 and 82 have to do with the air management system aka smog pump

Codes 84 is the EGR vacuum solenoid failure

Code 85 is canister purge solenoid failure.



Did you eliminate all the smog pump and related smog vacuum plumbing on the pass side of the motor???
 
Well that may have something to do with it.

You'll need to source the lines and solenoids needed to make the EGR functional...or go get a tune to eliminate it completely from the EEC programming