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From: gordon@cae780.UUCP (Brian Gordon)
Newsgroups: net.auto.tech
Subject: Re: Vapor Lock
Message-ID: <1612@cae780.UUCP>
Date: Sun, 24-Nov-85 14:40:31 EST
Article-I.D.: cae780.1612
Posted: Sun Nov 24 14:40:31 1985
Date-Received: Fri, 29-Nov-85 09:03:22 EST
References: <2922@vax4.fluke.UUCP>
Reply-To: gordon@cae780.UUCP (Brian Gordon)
Distribution: net
Organization: Tektronix, Inc. (CAE Systems Division), Sunnyvale, CA
Lines: 28

In article<2922@vax4.fluke.UUCP> marauder@fluke.UUCP (Bill Landsborough) writes:
>Im sorry Randle but there is no such thing as "Vapor Lock" in today's
>automobiles.  Vapor lock originated with the gravity feed fuel systems
>of the Model T era because what would happen is the gas would get
>close to boiling and bubbles would form in the fuel lines and try to
>go up as the fuel is trying to go down.  The result was a stalemate or
>what is known as vapor lock.
>
>Today's fuel pumps push fuel at a pressure of 7-10 psi and no bubble
>could ever have any effect on it.  
>
>Vapor lock tends to be the "scapegoat" when the mechanic can't solve
>the problem.  

WHOA there.  Want to come see it on my '83 Dodge Maxivan under load at
high altitide in hot weather?  The long under-car fuel line gets hot, 
vaporizes the gasoline and the fuel pump sucks vapor, not liquid.  Cool
the lines and the problem stops instantly.

I'll buy the "scapegoat" observation, but that isn't the same as saying
it can't happen!

FROM:   Brian G. Gordon, CAE Systems Division of Tektronix, Inc.
UUCP:   tektronix!teklds!cae780!gordon
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