re : I am trying to diagnose a flat four > with four venturis and individual intake manifolds. Then I guess you'll have to put a vacuum guage on each individual intake manifold. or run four small hoses to one junction, and take the vacuum reading there. what kind of car and what symptom ? porsche ? pmail me if you want. scott www.turbovans.com ----- Original Message ----- From: "Jake de Villiers" <crescentbeachguitar@GMAIL.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Saturday, August 22, 2009 10:15 AM Subject: Re: Friday question.Re: Vacuum gauge NVC
> Connect to a port in the plenum if you want to get a proper reading Ken. > The vacuum in the runners is obviously cyclic - suck, squeeze, bang, > blow - > right? =) > > If you still get a swinging needle at the plenum source, you have a > problem. > > On Fri, Aug 21, 2009 at 9:20 PM, Ken Lewis <kdlewis@northstate.net> wrote: > >> I have searched the internet but can not find the answer. All web >> sites >> state a "normal" engine's vacuum, at idle, is ~ 17 to 21 inches at the >> intake manifold. But, all these examples are for cars with one manifold >> connected to at least four cylinders. I am trying to diagnose a flat four >> with four venturis and individual intake manifolds. When I attach the >> vacuum gauge under a single venturi it produces rapid swings from zero to >> 20. Do I need to connect all test ports together to smooth these readings >> out or is this the problem? >> TIA >> Ken >> > > > > -- > Beverley Anne de Villiers April 20, 1930 - July 4, 2009 > > Jake > > 1984 Vanagon GL > 1986 Westy Weekender "Dixie" > > Crescent Beach, BC > > www.thebassspa.com > www.crescentbeachguitar.com > http://subyjake.googlepages.com/mydixiedarlin%27 |
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