Date: Tue, 23 Mar 1999 16:48:20 -0800
Reply-To: yahi <yahi@OLYPEN.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: yahi <yahi@OLYPEN.COM>
Subject: Re: Service Bulletin for AFMs and harness
Content-Type: text/plain; charset=ISO-8859-1
Date: Sun, 10 Jan 1999 23:40:07
Subject: Engine cutting out
Still trying to access the archives but I did save this message a while
back.
Hans Peter wrote:
I have an 87 Westy that also had hesitation. Tried everything, replacing
the Hall unit, the distributor, clean the gas tank, etc ; even had the
factory in Hannover Germany look at it while I was living in Denmark; NO
LUCK in fixing the problem, UNTIL I by accident found the following VW
Technical Bulletin.
Here is a copy and it applies to all watercooled Vanagons, not just the
Digifant ones (there is an updated bulletin no.92-02 that states all
waterboxers) ;
Technical Bulletin Group: 24 Number: 92-01 Date: Feb. 29, 1992 Subject:
Vanagon Intermittent Misfire Model(s) All Vanagon Digifant Fuel Injection
Engines
CONDITION After driving for 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 dealer results in nothing conclusive.
Some air-flow meters may experience a vibration resonance of the meter
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
* install convertor 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) CAUTION: Part
numbers are for reference only. Always check with your Parts Department for
latest information.
Thats what the Tech Bulletin says. I went to a local VW dealer, Niello in
Sacramento, CA. They had this part on the computer and ordered it for me.
Harness costs about $100.00 US, very simple to install. Takes about 3 min.
max. The new harness fits between the old harness and the silver air-flow
meter box attached to the air filter box. Remove the silver clip, wiggle
out the big wiring connector (from the side of the air flow meter), connect
the proper end of the new harness to the big wiring connector you just
wiggled out, put the new clip into the new connction, then take the other
end of the new harness and plug into the air flow meter connection. Put the
silver clip back, and presto you are done. I did this and have driven jerk
free (aside from those behind the wheel on the road) ever since. I hope
this is of help.
Hans Peter
87 Westy 71 Sandrail
----------
> From: KENWILFY@AOL.COM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Service Bulletin for AFMs and harness
> Date: Tuesday, March 23, 1999 1:28 PM
>
> Been talking to several people lately about Vanagon AFMs (gee I wonder
why?)
> and the ghost harness. I remember seeing a post of the VW service
bulletin
> from one of those CDs that some folks on the list have. Could someone
repost
> this SB? Just wanted to be better informed on this issue. I tried the
> archives but they are down right now.
> Thanks
> Ken Wilford
> Van-Again
> John 3:16
