

| Subject: | Fwd: What IS Vanagon Syndrome, exactly? |
| From: | Alain Thibault |
| Date: | Sat, 19 Oct 2013 16:57:03 -0700 |
Allo Would someone happen to have the VW part number for that harness? > Thanks > > Sent from my iPad 2 > >> On 2013-10-19, at 16:21, Larry Alofs <lalofs@GMAIL.COM> wrote: >> >> Don, >> Having read the original reports on this on the list about 10 years ago, >> this is my take. >> The term "Vanagon Syndrome' as it was originally used referred to a >> mechanical vibration of the wiper arm in the AFM causing an intermitant >> signal to the ECU which then shut down the engine temporarily. In the >> cases studied by the reporting engineers, this typically happened after >> driving for an hour or more at steady highway speed. That is how it >> happened to me. >> The plug-in harness from VW and the "capacitor fix" are two different >> approaches to a solution. I believe that the harness from VW contains >> active components (like transistors), not just a capacitor. In any case, >> the idea is to filter the output from the AFM to reduce or eliminate the >> momentary glitches from the vibrating connection. >> When I had a VW engine in my "91 GL, I solved the problem by adding a >> capacitor. I believe that I used a slightly larger value than the 10 mfd >> commonly recommended. Calculation of the RC time constant of the circuit >> seems to support this. >> >> Larry A. >> >> >> >>> On Fri, Oct 18, 2013 at 10:44 AM, Don Hanson <dhanson928@gmail.com> wrote: >>> >>> Like the subject says. I just saw a few posts about a Digifant inline >>> VW powered vanagon traveling the southwest, like I soon will be doing >>> again... He says he's having engine cutting-out problems and someone >>> suggested he is experiencing "Vanagon Syndrome".. I've seen this mentioned >>> often before, but it got my attention this time, since this fellow traveler >>> seems to be driving a similar Vangaon to mine. I 'assumed' us inline >>> drivers were immune from Vanagon Syndrome...but that may not be the case? >>> >>> Anyhow, forewarned is forearmed...or something like that...and when I >>> head out around Xmas time to travel the outback west I guess I should know >>> what this condition might be and how to go about fixing it, should it ever >>> happen to me in my 84 digifant II with a 93ABA block and 92 Jetta top end >>> VW inline motor. Anyone care to outline what this condition is and how >>> to fix it when out on the road? >>> >>> I have never experienced any weirdness with my engine management, so >>> far...(fingers and toes crossed) other than a hinky throttle position >>> switch and of course the Temp II sensor..I travel with a lot of spares and >>> wouldn't mind having something for the Vanagon Syndrome, should I ever >>> encounter it with my rig. >>> >>> Thanks in advance, Don Hanson >>>
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