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Message-ID: <374F5C39.F89FF23F@kymtnnet.org>
Date: Fri, 28 May 1999 23:17:13 -0400
From: LARRY ELSWICK <sos@kymtnnet.org>
Reply-To: sos@kymtnnet.org
Organization: SPORTS OUTFITTERS SUPPLY
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To: WGrills@aol.com
Subject: Re: Anti-run-on valve
References: <c25278ce.247e0f1d@aol.com>
WGrills@aol.com wrote:
> Hi Larry: Have been looking for my 1500 Bentley manual, someone seems to have
> borrowed it. However, found some notes. Bypass valve tube is not connected to
> any hoses, this valve only operates at idle or high manifold vacuum
> conditions, doubt that it would contribute to any mixture problems. More
> likely is manifold leak or leaky valves. Manifold leaks can sometimes be
> found by spraying soapy mixture around edges of manifold while idling, look
> and listen for obvious differences. Also, have you done compression test, low
> compression on one or more cylinders will screw up plug readings. Let me know
> what you found and where you are in diagnosis, glad to help if possible.
> Thanks, Wayne Grills
According to the diagram in my Haynes
manual the valve is connected to the
manifold vacuum on one side and the
canister purge line on the other. The vacuum
line from the intake manifold that supplies
cylinders 3 and 4 is the line I'm talking about.
The anti-run-on valve was allowing this to be open;
therefore air was being drawn into the intake at
cylinders 3 and 4. This really caused a difference
in the mixture for cylinders 3 and 4 versus 1 and 2.
Surely this isn't the way it should work. I plugged it
off ,and I'm trying to retune the carb. What do you think?
Thanks!
Larry
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