Date:         Fri, 30 Oct 1998 10:59:22 -0800
Reply-To:     Ari Ollikainen <Ari@OLTECO.COM>
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         Ari Ollikainen <Ari@OLTECO.COM>
Subject:      Re: Euro-Drive: 89 Volkswagen VANAGON, Hesitation
Comments: To: vanagon@VANAGON.COM
Comments: cc: jihoard@classic.msn.com
Content-Type: text/plain; charset="us-ascii"

>Jim Hoard wrote:
>
>>
>> 1989 Volkswagen VANAGON 2.1 L
>>
>> Trans:         Standard
>> Mileage:       100,960 miles
>> VIN:           WV2YB0251KH072546
>>
>> Symptoms:      Hesitation
>> Occurs:        Cold
>>
>> ____________________________________________________________
>>
>> We have performed all sensor checks and point to point
>> engine harness checks i.a.w. Bently manual. We have
>> substituted good computer, air flow meter and idle
>> stabilizer with no change in results. The vehicle when cold
>> has periods of hesitation up to ten seconds in length when
>> accelerator pedal is held down. It does not stall but has
>> near idle power. It is as if your foot is off the gas. When
>> it comes to life it has full power. This event sometimes
>> happens several times during warmup. Sometimes it does not
>> happen at all. It never hesitates more than a second when
>> warm. Fuel pressure is normal during hesitation. Thanks for
>> any help.
>>

        The very same thing happens with my '91 Vanagon camper!

        When it occurs, it's always within the first 5 minutes
        of a cold start AND generally occurs when accelerating after
        a stop or after idling in traffic. My belief is that it's somehow
        caused by a combination of *bad* values from the oxygen sensor AND
        one of the temperature sensors.






      OLTECO                    Ari Ollikainen
      P.O. BOX 3688             Networking Technology and Architecture
      Stanford, CA              Ari@OLTECO.com
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