Re: Vacuum questions 8v :Re: julie's car..

[Cheapass Ron <rapieper@yahoo.com>]

Julie, when was the last time this car ran right, and
what was done (in detail) since then?  I'm thinking
the drop in vacuum is a symptom and not a problem.

Ron 


--- Brian McGarvey <brianm@zbt62.eastnet.gatech.edu>
wrote:
> On Sun, 13 May 2001, Julie Macfarlane wrote:
> 
> 
> I dont think the cat is going out
> or the fuel pump is going out.
> that wouldnt make any sense
> the bernoulli(bas spelling) effect is how the car
> gets its vacuum.
> there is a flow of fluid (air water whatever) moving
> in a pipe with a hole
> perpendicular to the flow. the flow rate INTO the
> mainpipe is directly
> proportional (with some F(x) or constant) the the
> flow rate in the main
> pipe. your problem is that at a particular RPM (flow
> rate big pipe) the
> vaccuum (flow rate small pipe) goes to near zero.
> 
> For any of you vaccuum experts out there.
> any suggestions.
> I'm thinking about it and i am at a loss. Jewels.
> 
> Try the following.
> with the car stationary plug all the holes except
> one for measuring the
> vacuum. (there are 3 on the t-body two on the back
> and the big one on the
> front. it is imortant that you plut them at the
> metal posts that stick
> out.
> rev the motor up and see if you get good vac. You
> should. there are no
> vacc circuits other than these that I know of from
> this.
> 
> then try plugging one vacc circuit at a time until
> you find one that goes
> bad. then t-shoot that system. in the same manner.
> Its slow but it should
> work.
> 
> If that doesnt show your p[roblem then you have two
> cuircuits that are
> interacting and then try pairs of the circuits (3
> combos) until you get
> the combo that does it.
> 
> if is more complicated than that we'll have a BBQ at
> your house and we'll
> round up the willing NYC area listers to come and
> fix it. between the 19th
> and the 29th. (when i'll be there)
> 
> 
> 
> 
> > There is no leak I can find.
> > I am going to swap out the dist for a points type
> dist with minimal vac
> > systems. I am also changing the plugs.
> > The guys at the parts place said that the cat
> might be blocked or that the
> > fuel pump might be on the way out....
> >
> > Any comments, ideas?
> >
> >
> >
>
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