Date: Tue, 5 Aug 2008 23:08:47 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Just Gotta Be A Vacuum Leak!!
Content-Type: text/plain; charset="iso-8859-1"
something you are well versed in no doubt !
lol.
----- Original Message -----
From: Jake de Villiers
To: Scott Daniel - Turbovans
Cc: vanagon@gerry.vanagon.com
Sent: Tuesday, August 05, 2008 10:54 PM
Subject: Re: Just Gotta Be A Vacuum Leak!!
Wine or single malt corks work very well....
On Tue, Aug 5, 2008 at 8:27 PM, Scott Daniel - Turbovans <scottdaniel@turbovans.com> wrote:
if you think any vaccuum leaks in the brake booster system, or the vaccum
lines leading to that are causing engine runing issues.........
simply apply the diagnostic strategy of 'Substitue and Bypass'.....
which in this case would be to remove the vaccum line from where it joins on
to that can in the middle of the intake runners. ..........that can with the
throttle body on it.....
and plug that hole carfully, like with a hose with big bolt in it - a smooth
shanked bolt ......or even wooden plug - it's just a short term test.
this way the entire vaccum system in the whole body of the van is out of the
picture.
then see what it does.
and yes, you'll have greatly reduced braking performace, so be super careful
there.
anytime you can get various parts out of the picture ...........the better.
That's one way of isolating where the problem is or isn't.
Don't give up !
scott
----- Original Message -----
From: "Max Wellhouse" <dimwittedmoose@CFU.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, August 05, 2008 6:36 PM
Subject: Just Gotta Be A Vacuum Leak!!
Troops: In my saga of poor performing () GL 2.1 motor syndrome, I
went through the Haynes British manual I got from Bus Depot and went
through their troubleshooting guide. With all my performance issues,
the one thing that keeps showing up in their analysis is Vacuum
Leak. Sure, low compression and fuel injection issue come in 2nd and
3rd, but I don't have hot and cold start issues which both state that
low compression could be the cause of that.
I do also have a lot of travel in my brake pedal despite repeated
adjustments to the rear shoes and the front disc pads have plenty of
meat left on them. Under their listing of "excessive brake pedal
travel", they list sevo vacuum leak, and shot brake servo. I don't
know if this makes the scales tip one way or the other, but if I were
to pump the brake pedal repeatedly9 or 10 times(when the engine does
try to idle every once in a while), the engine idle increases
substantially. Is this further evidence of something wrong? Crack
in one of the plastic pipe joints going back from the servo to the
engine? Gasket at a joint bad? The one way valve failing? The o
ring at the master cylinder? How would I check the servo visually to
see if it's toast? I do have the servo here from the 91 shell I just
parted out, but how would I tell if it was any better than the one I have?
If I were to try and isolate this problem, could I simply plug the
booster outlet and drive the van for a short while without the servo
sucking vacuum? Probably have a harder time stopping the van. This
engine pretty much doesn't want to idle period. I've gone back and
checked the valve clearances again and I'm happy with that part. I
am tapping vacuum from the FPR port to run both my vacuum gauge on
the dash and the MAP sensor for the Haltech ECU as well as the FPR,
but I've been doing that for years with no problems. Again, the
ether spray showed no engine rise or fall in rpm when spraying all
the likely leak spots, so I'm pretty much in another fork in the road.
Thanks
DM&FS
--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
Crescent Beach, BC
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27
