I run a VDO vacuum gauge on my dash all the time and my 2.1 idles at
about14-15in. and get to 23 or so under full
decelleration.  Obviously, it goes to 0 under full throttle.  8 is
defintely low and you should find that leak, wherever it is.  Where
are you tapping into the vacuum system BTW?

DM&FS

At 11:20 AM 12/30/2006, Geza Polony wrote:

>Volks--
>
>
>I've been trying to sleuth out yet another prob on my '84 1.9: erratic idle,
>compression noise under load, low (er) power on hills, harder starting when
>hot. I'm toying with the idea that there's a lifter problem, a valve
>problem, or worse, ie., rings or head gaskets.
>
>Now. I went out and got a vacuum guage and compression tester. However, I
>can't find the correct specs for vacuum readings ANYWHERE in the Bentley or
>the Haynes manuals. Am I missing something?
>
>Nearest I can find, searching the archives, is that 8 in. is too low. Is
>that right? What's the acceptable range?
>
>What else am I looking for in this vacuum test? Just vacuum level?
>
>Is there a way to pinpoint problems with it, or does it just tell you
>"there's a problem?"
>
>I want to try backing out the valve adjustment screws to give a .06 lash as
>suggested by some of the heavyweights here (and in Bentley) but understand
>it's  better to read vacuum and compression before and after.
>
>Thanks to all--
>
>Geza
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.1.409 / Virus Database: 268.16.0/610 - Release Date: 12/30/2006

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.16.0/610 - Release Date: 12/30/2006