Hi, I don't really understand emission control tests, but I would think we are talking about the amount of smoke getting past the rings in your engine that mixes with the exhaust fumes after a cylinder burn and is expelled out of your exhaust.
If that is the case, then I would recommend you get in touch with "Super Friction Fighter", 10600 S.145th W.Ave, Sapulpa, Oklahoma 74066 or
www.Moly4oil.com and purchase some Molybulibdium Disulphate powder in vials from him. Cost is roughly $5 per vial and must be mixed manually by hand with new oil you are about to pour into your engine after an oil change.Make sure you put the correct amount in for your cars engine size. I mixed mine in a drinking glass, which I threw away afterwards. Alternatively, look for Moly or Swipe or other similar products on e.Bay. This stuff mixes with the engine oil and during combustion it fills the minute pin pricks in the cylinder walls with Moly (like non slip frying pans) the slipperiest substance known to man and restores your engine to as new and increases your compression back to normal, without putting un-necessary strain on your overall engine, which a head job only, would do. You would have to run your engine for about 3,000 miles, but if you can do that, your problems should be resolved for about $5 - $10 tops.
I use Moly in all of my old cars, because old cars is all I can afford in Aussie. Renewing the engine for a few bucks has its advantages, but also, if you lose all of your oil, provided your radiator is full of water and working OK, you can drive your car for hundreds of miles without any oil in the engine at all, after the 3,000 mile oil change, because Moly provides a slippery surface internally which does not cause friction and thus heat, although I would not recommend doing it for long. Tests have been done. Check on line for Moly
BigBenn