Date: Mon, 24 Aug 1998 21:29:54 -1000
Reply-To: Peter Zendzian <peterz@GTE.NET>
Sender: Vanagon Mailing List <Vanagon@vanagon.com>
From: Peter Zendzian <peterz@GTE.NET>
Subject: Re: [Fwd: Intake manifold vacuum?]
Content-Type: text/plain; charset="iso-8859-1"
Ok, I may be able to save all of you some time here. I am having a similar
problem on my 1.9. I have completely rebuilt my top end, p/c, heads,
lifters, everything that can be done without cracking the case. I did all
this and came up with the same compression that I had before the rebuild.
1-90,2-150,3-85,4-150. I have done alot of research and spent alot of time
on the phone with Fast German Auto (I am in no way affiliated with them)
diagnosing the problem. One of the tests they had me run after I still had
the problem after the rebuild was a vacuum check. The Vacuum check can tell
many things, if the vacuum is low, mine is 7 in. be happy you can get 14, it
means that you either have a vacuum leak or low compression or a valvetrain
problem. The needle on my vacuum gage also vibrated about .25in signifying
that there defiantly was a valvetrain problem. Because of all that I have
already done to the engine and still had the same problems, we surmised that
one or more of the camshaft lobes was worn and since one lobe on the
camshaft affects the 2 pistons opposite each other, that was my best bet.
Now of course I am still screaming mad because I had the engine out for this
overhaul only a few months ago!! I now have a reground camshaft for a 2.1
on the way and new bearings for the main, cam and rod for might as wells
(since the engine is open, might as well finish the job!) I will let you
know the results when I have finished the job which I plan on starting
around the 15th of September.
Pete
peterz@gte.net
83.5 vanaong
-----Original Message-----
From: Randolph Feuerriegel <RFeuerriegel@BC.SYMPATICO.CA>
To: Vanagon@VANAGON.COM <Vanagon@VANAGON.COM>
Date: Monday, August 24, 1998 7:15 AM
Subject: [Fwd: Intake manifold vacuum?]
>Hello Kai.
>
>I'm running a vacuum gauge from the line off the pressure regulator up to
>the dash. At idle I'm reading about 14 Hg as well. I found a similar
>post from last year in the archives, also reading about 14 Hg at idle.
>Aside from being able to watch this gauge when driving, I also am
>experiencing problems with my 2.1, so this gauge gives me a little more
>info. My compression readings are similar to yours. Carbon the most
>likely culprit since my oil consumption is pretty good. 1 litter every
>2000 to 2500 km. At idle, my gauge needle flutters lightly, but does not
>move far, less than a digit.
>
>I have been told that carbon build up around the valves is causing a bit
>of a miss. Possible sticking valve, also my lifters are suspect. Changed
>5 of 8 of them. This helped some along with a pressurized carbon
>treatment. I still get an intermittent rough spot while hwy driving.
>Runs rich during extended hwy driving. It feels electrical, but I have
>checked each wire so many times, swapped ECU's, tried the magic cable,
>no change.
>
>Recently I noticed that the charcoal filter valve behind the airbox has
>a sharp click when you feather the throttle. Never heard it before. I'm
>wondering if it is malfunctioning and the cause a of vacum leak. If it
>is, is the leak large enough to notice while idling or driving. I have a
>bit of a hesition, but not like what I have read on your postings. Until
>now, I have decided that a worn throttle body, and poor throttle switch
>adjustments cause my hesitation. Hope this helps.
>
>R.Feuerriegel
>88 syncro in Victoria
>
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