Date:         Wed, 10 Aug 2011 16:16:27 -0400
Reply-To:     george jannini <georgejoann@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         george jannini <georgejoann@GMAIL.COM>
Subject:      Re: Help! Hesitation on the road!
In-Reply-To:  <4E42B1EE.7050208@comcast.net>
Content-Type: text/plain; charset=ISO-8859-1

I Googled...

VW technical service bulletins regarding driveability complaints read
as follows- The first details problems with Digifant engines and the
second one supercedes the first, acknowledging problems with Digijet
Waterboxers as well.

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Technical Bulletin Group: 24 Number: 92-01 Date: February 29, 1992
Subject: Vanagon Intermittent Misfire Model(s): All Vanagon Digifant
Fuel Injection Engines

CONDITION After driving for 1/2 to 2 hours at a constant speed,
vehicle experiences lack of power, cuts-out or stalls, often
accompanied by bucking or jerking of the vehicle. In ALL cases, the
vehicle will restart immediately.

 This symptom may not re-occur for several weeks/months. Inspection by
the dealer results in nothing conclusive. Some air-flow meters may
experience a vibration resonance of the metering potentiometer wiper
during extended constant driving. This resonance causes the air-flow
meter to supply an intermittent signal to the Digifant ECU. The ECU
will then default to a "no-load" condition and reduce the injection
time.

 SERVICE Harness, Part No. 025 906 302, is available to resolve this
condition. * remove electrical connector from air flow sensor (see
Figure 24-174) * install converter assembly, Part No. 025 906 302,
between harness and air flow sensor NOTE If customer complaints
persist after performing the above repair, contact your Zone Product
Support Specialist (TSM in Canada)

____________________________________________________


Technical Bulletin Group: 24 Number: 92-02 Date: April 30, 1992
Subject: Vanagon Drivability Complaints Model(s): All Water Cooled
Engine Vanagons SUPERCEDES TECHNICAL BULLETIN 24-92-01 (February 29,
1992)

 CONDITION After driving for an extended period of time at a constant
speed, the vehicle may, on occasion, experience a deterioration of
performance which may be accompanied by a hesitation or surging. In
many cases, after turning off the engine and subsequent re-start or
without having taken any action, the symptoms disappear. These
symptoms may not recur for several weeks or months.

 SERVICE To resolve this condition, wire harness Part No. 025 906 302,
should be installed. This harness provides improved signal voltage
stabilization. * remove electrical connector from air flow sensor *
install wire harness, Part No. 025 906 302, between main harness
connection and air flow sensor connection.

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