Pat, Be very careful in using any kind of fuel cleaner because of what it might do to the O Rings in the distributor. If you want to see if it will hurt them, then put a small amount of cleaner in a glass with a normal small Buna N-70 nitrile O ring, measure it before and after soaking over night in full concentration and see if it swells. If it does then you might have a chance either way depending on how much it swells in full concentration after mixing in gas. Normally what I do is put the cleaner in the gas when I'm going to go some distance and run it out. No sitting over night. But, Honestly if the injectors are that bad it would take months if at all to clean them. Hot start would most likely be the accumulator and the rough Idle could be the injectors. If you send them to me to clean, I also check the pattern, holding pressure, and opening pressure. If you have different opening pressures then this would be problems in idling smooth. The fuel distributor will also cause rough idling problems. John Hervey www.deloreanautoparts.com www.specialtauto.com -----Original Message----- From:schab932000 Subject: [DML] Rough Idle, Difficult hot starts I got an issue that I trying to put my finger on. My car starts fine on cold starts, but runs with an idle that rumbles... not very smooth. 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/