I see.........it's a dedicated Fuel Injection manual.
hot dog.
where do I get a "test adapter VW 1315A/2: ?

Have you ever tried to do exactly what they say to do in a book like this
.........but for some reason you just can't ?
Like not having some special VW tool or connector  ?

----- Original Message -----
From: "John Rodgers" <inua@CHARTER.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, March 25, 2009 10:58 PM
Subject: Troubleshooting the Basic Idle Stabilizer System - Manual
Transmissions- Part I

> This is long, but for the record and the archives, so please bear with me.
>
> John Rodgers
> 88 GL Driver
>
> In my Digifant FI manual -
>
> Part I
>
> Vanagon/Type II Fuel Systems - Digifant
>
> TROUBLESHOOTING GUIDELINES
>
> Poor Idle:
> a) At operating temperature
> 1) Throttle Switch
> 2) Idle stabilizer system
> 3) Evaporative Emissions System
>
> *2) page 115
>
> *NOTE !!*
> This procedure is for vehicles with manual transmissions only! Vehicles
> with automatic transmissions require that the  rear wheels be off the
> ground, rear brakes locked, and the transmission in "Drive". Two people
> are required to do all checks. Please refer to the FI manual itself for
> additional instructions.
>
> Idle Stabilization  - Checking the basic system
>
> ___ Engine at operating temperature, oil temperature at least 80C/176F.
>
> ___ Throttle Switch connected and functioning properly.
>
> ___ All electrical consumers must be off  during checking procedure.
> Coolant fan should not be running when observing readings.
>
> ___ Connect multi-meter US 1119 (or equivalent) to the idle
> stabilization valve using test adapter VW 1315A/2. Set range of the
> meter to 2 amp scale (readings will be in milliamperes)
>
> ___ Run engine at idle and observe reading. Basic idle value should be
> 430 +/- 15 mA. If no: the go to Idle Speed/CO Content - Checking and
> Adjusting.
>
> ___ If you have a fixed ( non-fluctuating milliamp reading and the idle
> is  high - approximately 1100-1200 RPM) , check for signal from terminal
> 1 of ignition coil at connector plug for Idle Stabilizer Control Unit.
> Connect US 1115 L.E.D tester between terminals 5 and 17 of connector
> plug. L.E.D. tester should flash while cranking.
>
> If YES: - replace the idle stabilizer control unit and proceed.
>
> If NO: - repair open circuit between terminal 1 of ignition coil and
> terminal 17 of idle stabilization control unit plug.
>
> If you have no milliamp reading and idle is low and/or surging, check
> for power to idle stabilization  control unit from terminal 87 of the
> power supply relay. Connect US 1115 L.E.D. tester between terminals 5
> and 14 of idle stabilization control unit plug. L.E.D. tester should
> come on when ignition is switched on.
>
> If NO: repair open circuit between terminal 87 of power supply relay and
> terminal 14 of the idle stabilization control unit plug.
>
> Part II: