Date:         Wed, 24 Oct 2007 17:28:25 -0700
Reply-To:     "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
Subject:      Re: Manifold measuring - is this right?
In-Reply-To:  <471FD68A.9030500@cox.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Thanks, Mark. I'll try that. Hang on, I'll be right back.

Okay, using the fuel pressure regulator port I read 10'' of Hg (not psi
as I said earlier, goes to show my inexperience!). This after engine has
warmed up and the aux air regulator (AAR) has closed.

M'kay, that seems low. Yet I can't find a leak anywhere. Have sprayed
various hydrocarbons like carb cleaner and propane on and around any
place where a leak could live and nothing has any effect on Mr Engine.

Getting ready to start huffing the stuff.

It should be mentioned that if there is indeed a leak, it makes sense
that the engine isn't slowing as it should when I choke the AAR hose.
And mightn't a leak contribute to my mileage being less than average?

Gotta find that stupid leak.

--

Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR

On 10/24/2007 4:34 PM Mark Drillock wrote:

> I would use the vacuum line to the fuel pressure regulator.
>
> Mark
>
> Mike "Rocket J Squirrel" Elliott wrote:
>
>> Hi, I'm looking for leaks in the intake manifold. Bentley's doesn't give
>> a procedure for checking intake manifold vacuum so I'm winging it. I let
>> the engine warm up so that aux air regulator thing is closed, and then I
>>  pulled one of the hoses going to the vacuum unit on the dizzie and
>> connected it to my fine Harbor Freight vacuum gauge.
>>
>> This is a 1.9L engine and the hose I'm using is the hose labeled "2" on
>> the left hand photo on page 24.25 in Bentleys.I don't know how
>> appropriate this hose is, but it has fewer bits connected to it than the
>> other one. There's also a hose going to the fuel pressure regulator,
>> maybe it's a better choice?
>>
>> ANYWAYS, when the hose is disconnected from the vacuum unit, the idle
>> hunts up and down. The vacuum gauge shows around 18psi -- depending on
>> engine rpms. I can open the throttle and the vacuum might drop to 10psi,
>> then climb back up . . . I really have no idea how one goes about
>> measuring vacuum.
>>
>> --
>>
>> Mike "Rocket J Squirrel" Elliott
>> 71 Type 2: the Wonderbus
>> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
>> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
>> KG6RCR
>>
>