Wonderful news in that vin 4258 failed its emissions idle test. Readings at 686 RPM were 289 for HC and 4.25 for CO% when 220 and 1.2 are legal limits respectively. I have read through my tech service manual and it says that I don't want to adjust the idle mixture screws since they are factory set and don't need subsequent adjustment. So, where should I start- is this easy as an air filter change (it probably needs one) or is it the cold start valve or thermotime switch, or a new direction completely. BTW the same readings were 72 HC and .8 CO% at the high speed test (2378 RPM) which passed. Any thoughts? 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/