It Kinda sounds like it could be a Cold start valve problem,or possible Co adjustment to rich,or even a Lambda ECU malfunction or sensor problem,also check these three other items for proper function,the Lambada Micro-switch,(for idle speed)the frequency valve,and the thermal vacuum control valve(for the bad gas mileage) For the bad running engine,check the the control pressure being to high,or possible injectors not spraying correct,or possible micro- switch problems,or it could be a simple thing like a bad/malfunctioning ignition coil,or a sticky air flow sensor. Hope this helps Claude --- In dmcnews@xxxxxxxxxxxxxxx, "outatime81" <outatime81@...> wrote: > > On my way home from the Northeast Exotic show, my car started to > sputter and cough blowing out a light black smoke. I went through > 3/4 of a tank of gas in about 60 miles. Sounds like it's running too > rich and blowing through gas. > > It would sometimes "catch" a good breath and smooth out only to begin > a downward spiral with even pressure on the gas pedal. I was losing > power, but then when I would "punch it" it would sputter up to speed > while putting out the light colored black smoke. This was happening > periodically for the past 4 weeks only in the mornings. I thought it > was either bad gas or a clogged fuel filter (which I replaced at the > beginning of the season). Seeing how much gas it used in the last 60 > miles of my trip I don't think that's the problem. Idle was ok for > the most part with a few stalls at traffic lights. It started right > up however. > > Any ideas? O2 sensor? > > Thanks > > Tom > 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/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> 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/