[NoVa-Corvairs] Vacuum leak?

[Darrin Hartzler]

Yeah, it would be a small vacuum leak that could mess with the idle...good 
catch.

Do you mean the brass nut with hole in the end of it?  If so, yes it comes 
off...that is whay it has the hex head.   Inside that is likely the 
remains of your old vacuum tube and the little brass bit that slips over 
the hose and allows it to seal when the nut goes back on....will make 
sense once you get it off.  If you like, I can check and confirm on the 
yellow car befor you torque it off.   Probably prudent.

Vacuum sounds fine to me...should pull a little less at idle, but if you 
idle is too high that makes sense....vacuum is greatest right off idle.

Darrin

-----------------------------------------
Darrin R. Hartzler
Senior Corporate Governance Officer
International Finance Corporation
Washington, DC
Phone: +1-202-473-0027
Fax: +1-202-522-1604
Office: F4K-144
e-mail: dhartzler at ifc.org



"Daniel Goldberg" <goldie at danielgoldberg.net> 
Sent by: novacc-list-bounces at corvair.org
09/05/2007 07:50 PM
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[NoVa-Corvairs] Vacuum leak?






So I was rooting around my 'Vair engine the other day and noticed that the 
plasitic manifold pressure gauge line -- the one that fits into the 
crossover pipe -- wasn't hooked up.

Seemed to be a pretty good reason why I could have a vacuum leak, so I 
installed it.  Except that I could only unscrew the little brass coupling 
-- the nut on the crossover pipe would not budge.  So I threaded the line 
through the coupling and into the crossover.

Some observations and questions:

1) Idle is certainly less erratic now; however, depending on the car's 
mood, it still ranges from perfect to way too low.

2) Why can't I unscrew that nut on the crossover pipe?  Is it supposed to 
unscrew?

3) My manifold pressure gauge now works.  I though the thing was busted, 
but it works!  Here are typical readings:

a) At full acceleration, 0
b) At partial acceleration (i.e., cruising) -7.5
c) At idle: -15

What's all that mean?  Is it good?

thanks!

daniel
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