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Originally Posted by kwmech
Bringing the base timing down will help with the HCs. Say set it a 4-6, adjust idle to about 700 and adjust the carb to match.
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agree with kwmech. you can also change to the leaner metering rods that came with the 1406. CRC sells a products to run in your gasoline. I forget the name but it is some like " pass smog now". It seems to work for me and was suggested by a technician that repairs failed smoggers. The biggest difference you can make is change the oil and oil filter just before you go to have the test performed.
* change oil and filter
* reset timing
* 1406 metering rods
* CRC engine cleaner
* make sure your plugs are clean and set
* new or clean air cleaner