TX:DOHC ZC won't pass emissions HELP.
09-05-2005, 01:34 PM
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Location: McKinney, TX, USA
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TX:DOHC ZC won't pass emissions HELP.
Ok, I tried searching but maybe I'm not trying the write words. Here's my case..I just purchased a 93 HB w/ a DOHC ZC in it, has a header, intake, 2.25 exhaust w/ an ES tuning muffler. I replaced the cat because it had a straight pipe originally.
After only 10 miles on the new cat (didn't know there was a break in period) here are the results from the smog check: http://pg.photos.yahoo.com/ph/...rc=ph
Here are the results after 110 miles on the cat and rxp additive to the fuel (89 octane gas in there): http://pg.photos.yahoo.com/ph/...rc=ph
SO I'm doing better on my HC count, but my NOX is double what it should be.
Anyone have the same problem, anyone know what I can do? I thought about replacing the O2 sensor, but it's not throwing codes, what about retarding the timing a bit (set at stock right now).
Thanks and I'll be forever in your gratitude oh mighty HT members.
Vic
After only 10 miles on the new cat (didn't know there was a break in period) here are the results from the smog check: http://pg.photos.yahoo.com/ph/...rc=ph
Here are the results after 110 miles on the cat and rxp additive to the fuel (89 octane gas in there): http://pg.photos.yahoo.com/ph/...rc=ph
SO I'm doing better on my HC count, but my NOX is double what it should be.
Anyone have the same problem, anyone know what I can do? I thought about replacing the O2 sensor, but it's not throwing codes, what about retarding the timing a bit (set at stock right now).
Thanks and I'll be forever in your gratitude oh mighty HT members.
Vic
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