Vacuum leaks are a plague on electric cars. I was very surprised to find out how the D's vacuum components "normally" leak. The mode switch circuit is terrible. I have isolated just the power break unit and the vacuum storage canister and they have a slow leak that requires the vacuum pump to run every 30 seconds. Dave has the same issue. I suspect the vacuum storage tank leaks. We be testing it soon. and let the group know. Bob ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/DMCForum/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/DMCForum/join (Yahoo! ID required) <*> To change settings via email: mailto:DMCForum-digest@xxxxxxxxxxxxxxx mailto:DMCForum-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/