Harold, I think the reason that didn't come up is we / group have to assume that some things are done or looked at or may be obvious before it comes to the DML. Vacuum lines and connections are fairly common problems. Then is when I feel peoples back is against the wall and they are looking for tougher answers. In any case your naturally correct on the vac delay valve. I personally haven't had one bad, but as we get older so do they. Guess I better find a new replacement. John Hervey -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxxxx Sent: Saturday, October 22, 2005 6:49 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: RE: [DML] Re: Strange acceleration problem ( For Rob Grady) Hi Harold, That's strange because I've seen very few of these check valve failures but it is a possibility. A loose vacuum line to the CPR is a much more common cause and the vacuum hose routing label should definitely be checked. Rob Grady [long quote trimmed by moderator] 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/ <*> 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/