Given the amount of fuel you used in 60 miles - the problem is most likely something that manages the main fuel pressures. It is probably a malfunctioning control pressure regulator or the cold start valve. I doubt the problem is a bad frequency valve or a problem with the Lambda simply because the fuel consumption is so high - Lambda issues don't normally cause that much of a fuel dump. Of course it could be anything that manages fuel pressure including the main control pressure valve or a sticking fuel plunger. You need access to a fuel pressure test gauge to diagnose the system properly. If you want to start a part at a time - I would start with the control pressure regulator. I would check to see if the filter screen is clogged, etc. before I replaced it. You can also check the cold start valve. Everything else really needs the right tools. BTW - assuming you still have one - there is a possibility the cat was destroyed (burned up) by driving 60 miles and dumping that much fuel. I would check it to be sure it is not clogged or coming apart inside. Harold McElraft - 3354 --- 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. This was happening > periodically for the past 4 weeks only in the mornings. > 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/