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From: marauder@fluke.UUCP (Bill Landsborough)
Newsgroups: net.auto.tech
Subject: Re: Vapor Lock
Message-ID: <2937@vax4.fluke.UUCP>
Date: Wed, 4-Dec-85 10:39:46 EST
Article-I.D.: vax4.2937
Posted: Wed Dec  4 10:39:46 1985
Date-Received: Fri, 6-Dec-85 06:23:19 EST
References: <2922@vax4.fluke.UUCP> <1612@cae780.UUCP> <538@cylixd.UUCP>
Distribution: net
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Lines: 41

In article <538@cylixd.UUCP> elf@cylixd.UUCP (Leonard Bottleman) writes:
>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....
>
>The fuel line from the gas tank to the fuel pump in my 1982 Dodge 024
>is too close to the exhaust manifold and on hot days, after the engine
>has been running for a while, the fuel boils out of the line when you
>let the engine slow down to an idle.  You then have to wait about an
>hour (the fuel lines are right on top of the manifold) to let the
>pressure in the line drop enough for the fuel pump to overcome it.
>
>That sounds like "Vapor Lock" to me.
>
>					Leonard Bottleman
>					RCA Cylix Communications
>					ihnp4!akgua!cylixd!elf
>
How can fuel be stuck in an open ended tube?  As long as the fuel pump
has fuel and it is working right, and the float is not stuck, the
float bowl will call for fuel(because the float bowl is empty) and the
fuel will be delivered.  There is no Vapor Lock possible.  
   What does sound more likely in your case is a defective float bowl
needle and the fuel is forced past it and floods your engine so you
have to wait for an hour to start it.
I am finding that people are insisting on calling the inability for a
fuel pump to pump air as Vapor Lock, however the original Vapor Lock
was when gas bubbles would boil and FORCE the fuel to stop.  None of
the responses have talked about gas bubble FORCE.
I do agree that air in a fuel pump can stop gasoline delivery and that
gasoline can be boiled by hot exhaust pipes creating that bubble
before the fuel pump.  If you prefer to call that Vapor Lock then so
be it.
Bill Landsborough

 
----

"Love is patient and kind; love is not jealous or boastful; it is not 
arrogant or rude... Love bears all things, believes all things, hopes all
things, endures all things."   1 Corinthians 13:4-7