I think I understood "jumping" as surging.  Hope I'm right :>)
Karl Batzler
84 Vanagon
87 Audi 5000 S
La Quinta, CA
-----Original Message-----
From: EMZ <vw4x4@FYI.NET>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Wednesday, January 27, 1999 4:24 AM
Subject: Re: Advice needed: engine speed jumping abruptly

>     "Jumping" ? do you mean idle?
>
>            Eric                   86-VW4x4
>            vw4x4@fyi.net          72-240z
>            Pittsburgh, PA USA     1936-Chrysler
>
>
>On Tue, 26 Jan 1999, Karl Batzler wrote:
>
>> I would personally suggest replacing the O2 sensor first.  If this doesn't
>> do the trick, try the AFM capacitor fix.  If you need directions, I'll
>> p-mail them to you.
>> Karl Batzler
>> 84 Vanagon
>> 87 Audi 5000 S
>> La Quinta, CA
>> -----Original Message-----
>> From: S Sittservl <Ssittservl@AOL.COM>
>> To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
>> Date: Tuesday, January 26, 1999 4:15 PM
>> Subject: Advice needed: engine speed jumping abruptly
>>
>>
>> >I'm looking for advice on a problem I'm having with my '88 Westfalia.
>> >I've seen messages from others with similar problems, but I'm not
>> >sure if quite the same thing.
>> >
>> >When I've run the van at highway speeds (70 MPH) for a few hours,
>> >the engine begins to drop around 300 RPM every once in a while,
>> >causing the van to slow abruptly.  After about 1 to 5 seconds,
>> >the engine returns to its normal speed (and the van jumps ahead).
>> >Occurances are anywhere from a couple of seconds to a few minutes
>> >apart.
>> >
>> >If I pull off and let then engine go down to idle speed, it will die.
>> >It has a little trouble restarting, but not too bad - I've always
>> >been able to restart it.  If I let the van "rest" a while - somewhere
>> >between an hour and overnight, I think - the problem goes away.
>> >(It will return after a few more hours of driving, though.)
>> >
>> >So far I've only experienced this in cold weather, but I don't know if
>> >that's affecting it, or if the problem just happened to get started
>> >in late fall.  Also, I don't know that "highway speed" is necessary -
>> >I haven't had the opportunity to drive the van for hours at a time
>> >at slower speeds.
>> >
>> >It's time to replace my oxygen sensor - could it affect this?
>> >
>> >Thanks for any advice.
>> >
>> >                                       -Steven Sittser
>>

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