Well, it's that time again - time to have the old chariot smog tested.
3800 1994 TransSport had new engine and cat installed just over 2 years ago. It now has less than 30,000Km on it. When the new engine was put in it just squeaked by on the Hydrocarbons at speed, and was good at idle. I figured it would get better when the engine was broken in. Today it failed the HC. NOX is on the high side, but still well within range. Idle test is fine. CO is about half the limit. I suspect the beast is running lean (it does act a bit that way - feels a bit weak at light throttle 80-100km cruise, but pulls strongly when operating at higher throttle setting)Any experience with smogging this engine that might point me to the solution?