Jeff (Atheyg)

Finally got my new toy working, I have purchased as a package 2 Sun MGA 9000 Cali edition smog machines,these machines read CO, Co2, HC and O2.

For starters anyone know what I should shoot for concerning CO and HC readings?




The headers have ports for each cylinder so I can diagnose and fine tune each carb. I started by putting it just in the exhaust tail pipe and it clear the carbs are way off, the engine was not fully warm but my CO readings were around 6% which is very rich and the HCs were around 4000 as well, so I am dumping raw fuel out the exhaust basically as the car is catless also. I am going to try and get around 2.5% CO as I know carb cars like it rich unless suggested otherwise, don't know what is acceptable for HC on a carb car though.

Thanks