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Date:   Wed, 24 Oct 2007 17:34:44 -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?
Comments:   To: Mark Drillock <mdrillock@cox.net>
In-Reply-To:   <471FD68A.9030500@cox.net>
Content-Type:   text/plain; charset=ISO-8859-1; format=flowed

Should the engine be idling, or what, when measuring vacuum? Could be doing this wrong. --

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 >> >


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