Sorry it took so long to post the progress. Finally got the car retested. Ran a can of SeaFoam through and then two more tanks of Chevron 91, ran it for about 20 mins. on the freeway and then took it to the smog check shop and kept it running until it was tested. IT PASSED! NOx numbers were reduced and HC was reduced at 15 mph to the max allowable.
One question: Both HC numbers were at the max allowable and I tried just about everything I could to reduce them. I was successful with the 15 mph reading but didn;t budget the 25 mph reading. Should I expect to be able to reduce them any more with this car? Will I face having to meet even lower numbers next time or will this be as low as I need to get them?