Date: Mon, 16 Jun 2014 12:36:23 -0600
Reply-To: OlRivrRat <OlRivrRat@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: OlRivrRat <OlRivrRat@COMCAST.NET>
Subject: Re: Vanagon Syndrome is it also known as Digifant Disease, maybe?
In-Reply-To: <CAHTkEuLoU9RiHqDW1p+-vNjHhqzt8nBofqgPGLnsLKXfwWC76w@mail.gmail.com>
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Don
You Really Need to get that Crack Fixed ~ AnyTime you have performance Issues
with an Engine & you also have a KnownFault that could be contributing to the Issue it
is wise to eliminate the KnownFault before you attempt to get in to the Diag' ~
ORR ~ DeanB
On 16 Jun , 2014, at 9:21 AM, Don Hanson wrote:
> On Mon, Jun 16, 2014 at 7:41 AM, Larry Alofs <lalofs@gmail.com> wrote:
> I'll second what Mark said. Typically after driving for an hour at steady
> hiway speed, vanagon syndrome causes the engine to start to cut out for a
> heart stopping moment or two, while driving. Some times it gets worse,
> sometime it clears up, especially if you change speeds.
> Since your problem is at idle, I would first suspect the idle switch.
> There should be two wires leading from it to a connector nearby. If you
> disconnect it there and test with an ohmmeter you should get some useful
> info. Set the meter to the lowest resistance range. It should read close
> to zero if you hold the leads together and some meaningless reading when
> they are not touching. Connect the leads firmly to the wires from the idle
> switch and move the throttle away from the idle position and back. The
> switch should conduct electricity every time the throttle is closed,
> reliably, whether closed gently or snapped closed. The switch should not
> conduct when the throttle is move a little off the idle position.
>
> Good luck,
> Larry A.
>
>
> Thanks,
>
> I have noticed a very slight hesitation sometimes when I resume throttle
> after a downhill....the motor seems to be bogging a little just for a
> second and then it catches and resumes normal running..This often happens
> at the bottom of a gully after I have been off the gas for the downhill and
> need to resume throttle for the uphill...
>
> Maybe I should just replace that switch, if I can determine exactly
> which type I need and get the correct one...Every other part in the system
> has been replaced and the older parts are living under my rear bench as
> "iffy" spares, but I haven't swapped that throttle switch and it may indeed
> be faulty.
>
> What exactly does a "throttle switch" do?
>
> Ahh! , another clue is that the engine/exhaust has been increasingly
> 'popping' out the exhaust pipe on 'drop throttle', especially as the
> vehicle is first started up but sometimes even when full temp. I have been
> thinking this popping is due mainly to an exhaust system crack near the
> head pipe junction...but now that I think on it, there has to be excessive
> fuel being drawn through the motor in order for it to ignite in the exhaust
> system and cause that popping...and if the throttle switch does what I
> think it does, it should be cutting the fuel off when the throttle is
> closed, yes?
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