If you are at .50% CO w/o a cat, you can richen it up a bit and get a nice boost in power and drivability. Your HC indcates it's time for an ignition tune-up and maybe some better injectors.

I am surprised you passed a smog test with no cat - in VA with a 1978 or later car, you flunk without one, regardless of the readings.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe