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Vanagon Bogs when raining
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1971BugGuy
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PostPosted: Sun Oct 27, 2013 6:30 pm    Post subject: Vanagon Bogs when raining Reply with quote

Recently my van has developed symptoms very similar to Vanagon Syndrome but only when it is raining. The van will be running great and then it starts to rain. Very shortly after it begins to rain steadily the inevitable bucking and bogging that is commonly associated with the syndrome occurs. Turn off the ignition and turn it back on again and it corrects itself... but only for a minute or so... or until the rain stops. Any ideas anyone?
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Ahwahnee
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PostPosted: Sun Oct 27, 2013 6:37 pm    Post subject: Reply with quote

I recall that when my Vanagon used to experience the Syndrome it was more common in the rain. I thought perhaps it had something to do with the draw of the wipers & lights.

It also was more common when my wife was driving as she does not use cruise control and tended to maintain a very steady throttle.

Anyway, I did the capacitor fix and thus have no more data points on this. Costs about a buck to add that cap and certainly can't hurt to try it.
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dhaavers
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PostPosted: Sun Oct 27, 2013 8:55 pm    Post subject: Reply with quote

Maybe: Add a smear of dielectric grease inside your coil & plug boots.
Keeps your spark contained. Humidity can tend to "dampen" it a bit...
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BigNick0
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PostPosted: Mon Oct 28, 2013 4:59 am    Post subject: Reply with quote

This is a common problem with a badly spliced oxygen-sensor wire. I suffered with this myself on a splice I did and eventually replaced it with a new sensor that had the proper connector.
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sanchius Premium Member
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PostPosted: Mon Oct 28, 2013 7:40 am    Post subject: Reply with quote

BigNick0 wrote:
This is a common problem with a badly spliced oxygen-sensor wire. I suffered with this myself on a splice I did and eventually replaced it with a new sensor that had the proper connector.


I had a similar problem.
The O2 sensor is right behind the drivers rear wheel so it gets lots of water directed at it.
I put heat shrink tubing along the wire length to the top of the sensor and it fixed my problem.
The next step was going to be fabing a shield to protect the sensor from wheel spray, but it wasn't needed.
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phlogiston
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PostPosted: Mon Oct 28, 2013 12:22 pm    Post subject: Reply with quote

try new ignition wires. the insulation can decay with time and it's no easy task containing that kind of voltage. i've fixed this exact problem on several vehicles with new wires.
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