You bet I am going to do that AFTER the smog test. The shop nitpicked and said my timing was set at 20 BTDC, too high, should be 16. Whatever.

Got too high NOx readings (they test NOx here), so I adjusted the air/fuel mixture 1/2 turn clockwise and am running the fuel additive to remove carbons from the system. Yes EGR works fine.

Does the mixture screw apply ONLY for idle, or does it apply for the rest of the rpm range except WOT?

David