18.5" is a little low but still in the healthy range at idle. In your case, your car really isn't at idle, though. I suspect that your high idle is due to something physically holding the throttle open a little bit. Could be the cable is adjusted too tightly, or it might be the idle screw adjustment, or the adjustable linkage rod might need adjusting. (Or some combination of the above.) With the throttle open a bit you are not going to get a high vacuum. Set up your idle correctly and I'm guessing you will see more vacuum afterwards. From what you've said so far there's no reason to suspect a vacuum leak at this point. -Joe Kuchan >From: "delorean6584" <carburateur100gaz@xxxxxxx> >Reply-To: dmcnews@xxxxxxxxxxxxxxx >To: dmcnews@xxxxxxxxxxxxxxx >Subject: [DML] Re: Need vacuum measurments >Date: Mon, 06 Feb 2006 03:08:45 -0000 > >my car is a non-turbo and this was at idle....i need to adjust it, but >before i need to check if theres any vac leak, are you able to take a >reading at this rpm ? if not i will need to finish my headers then >lower the idle and take another measure > >thanks >yan 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/