Date:         Sun, 14 Feb 1999 20:22:49 -0600
Reply-To:     Darrell Boehler <midwesty@MIDWEST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Darrell Boehler <midwesty@MIDWEST.NET>
Subject:      Re: hesitations (air flow meter)
Content-Type: text/plain; charset="iso-8859-1"

-------------------
Hi Kai,
    Ok I give up, what bosch book are you using that tells you to measure
afm voltage? I have even searched some old bus manuals, some  bosch
L-jetronic books but all my books mention using resistance to verify proper
operation of the afm. Thanks
Darrell


-----Original Message-----
From: Kay O Fremgen <kayfremgen@JUNO.COM>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Sunday, February 14, 1999 10:17 AM
Subject: hesitations (air flow meter)


>Hi Joe,
>
>There is not a lot that you have to know about this AFM. 1 The air vane
>(flap inside the meter) must open freely, smooth with on restrictions
>other then the spring tension. 2 on page 24.45 of the Bentley you will
>find the test for the AFM step 1 and 3 are clear. It is test 2 that I
>unclear. Bosch has a better way of testing this. Remove the black cap and
>connect a volt meter (analog meter it is easier to see the results) to
>pin 2 and 3 of the potentiometer (you will find the numbers if you unplug
>the 4 pin wire at the AFM) then plug the wire back in and turn the
>ignition on then slowly open the air vane it should start at 0.2-0.3
>volts and then slowly move to 4.5 Volts with on jumps.
>
>Good luck
>Kai
>
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