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Subject woohoo finally passed my emissions with 720cc program
     
Posted by MikeH(Phoenix) on February 20, 2001 at 10:02 PM
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Message First time, I didnt' have cats. I was double or triple the readings for HC CO and NOX.

I put my cats on and I scored on grams per mile on the dyno rollers.

CO 1.5 1.00 is the maxim
HC 16 12 is the maximum allowed
NOX 2.4 2.5 is the max

Went back after installing my AFC and
lowered my fuel pressure down to 31 lbs down from 38lbs.
I also had the afc lowered my fuel -8% at low throttle.

I passed real clean on the HC and CO but my NOX went up to 6.00 which was expected with runnng lean.

The inspection station was real cool. I showed the inspector my AFC and told him I can adjust it to run a little richer to bring down the NOX. I added 10% above zero correction across the rpm range.

The results are
standard
HC .19 1.00
CO 1.67 12.00
NOX 2.01 2.5

I have no EGR. That is not bad. The cats are coming off tomorrow. I get to register my car finally. Only have 550 miles on my engine.
Mike

     
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