Hmmm... It looks like you might be running a little too lean. The CO2 reading are down a little from what I'd like to see, the O2 is also a little low, HC is quite low, (I'd like to see closer to 75-100ppm, though lower is less polluting). CO I'd like to see closer to 0.1-0.5 or so. I'm not sure exactly what the limits are where you live, so these are just ballpark figures based on WA emission standards. All in all it looks like you have a good running engine that is just a touch lean. Richening slightly will lower the combustion temps and lower the NOx levels. Just don't raise it so much that you fail on CO :) If it isn't possible to bring everything into specs, the Cat may be starting to fail, but I don't see anything really wrong with it based on the numbers. Matt Smith --- In dmcnews@xxxxxxxxxxxxxxx, "valleyrat12" <valleyrat12@xxxx> wrote: > > 15mph- C02 14.37 O2 .37 HC 16 CO .02 NO 1147 > 25mph- C02 14.45 O2 .37 HC 13 CO .02 N0 1283 > > Technically I only failed the 25mph of the NO but 15 mph was close. > (1147 out of 1148)Every other number is way low. > > Nathan > > > --- In dmcnews@xxxxxxxxxxxxxxx, "dmcchaser" <dmcchaser@xxxx> wrote: > > > > Could you post the rest of the numbers please? It would be good to > > see the whole picture to get a better idea of what's going on. > > > > Matt Smith > > > > > > > > --- In dmcnews@xxxxxxxxxxxxxxx, "valleyrat12" <valleyrat12@xxxx> > wrote: > > > > > > Here are the numbers: > > > > > > 15mph NO (PPM) 1147 (1148 max allowed) Squeaked by.. > > > 25mph NO (PPM) 1283 (978 max allowed) OUCH!! > > > > > > All the other nimbers are really low, way below the average. > > > > > > Any ideas, is it the cat? > > > > > > Nathan > > > > > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/