Ok, I failed my Smog Test again today.
I was able to bring my HC down by ridding the stumble on acceleration. It's close but no cigar.
1) What I did to eliminate the stumble was to remove the vacuum to the Diverter Valve, which open the valve to let air from the Smog Pump in the Exhaust. I can make it stumble by putting a vacuum pump on the Diverter Valve.
2) Since I disconnected this, I no longer am putting air into the Exhaust, which I believe is why my Nox went up.
3) I am ready to have my spare "new" Catalytic Converter Welded on since I have a feeling my Cat went bad since the car always ran very lean.
Please take a look at the Smog Test results and throw me some ideas.
This is the last PASS in 2009
This was the FAIL in June 2011
This the FAIL yesterday - Aug 2011
