That's part of my point although probably not as clear - the control pressure (aka warm-up) regulator can fail in several different ways (too high, too low, too slow etc...), and each way can cause dramatically different symptoms. Dave S --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@...> wrote: > > Have you checked the function of the control pressure regulator? The > only part of the fuel system that adjusts mixture as a function of > temperature. It's perfectly feasible, given it's an electro- mechanical > device, that it doesn't behave as it should on cool down, leaving the > mixture appropriate to a hot engine when the engine is just warm. > > You need to get a fuel pressure gauge on your car to actually observe > the primary and control pressures in order to understand what's going > on. Who knows, maybe it's an ignition problem (eg the connectors on > the ballast resistors and coil - that's another favourite for this > sort of problem). > > Martin > 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/