James,

The throttle body on my '87 has worn to the extent that the butterfly plate
does not always return to the exact same position. Thus if I set the gap for
the throttle position switch to factory specs it often won't close when the
throttle is closed. I had to open the gap up a bit above the specified value
to get the switch to close 100% of the time. The van runs fine like
this--you shouldn't have any problems if you open the TPS gap several
thousandths above the spec value.

Mark McCulley
87 syncro Westfalia
Seattle WA

>From: James Creech <jacreech@VISUALLINK.COM>
>My TVS was improperly adjusted, such that my switch was never closed at
>idle
>at all - thus no info sent to ECU and very poor idle, esp. when cold.  But
>WHY such a small gap?  Is it to ensure when giving throttle from the
>acceler. pedal that the idle, info to ECU is cancelled, or no longer given?
>Is there another reason?  If that is the only reason, one would think the
>gap could be a little larger, for when giving more throttle the switch is
>still going to open very soon and give infinite elec. resistance, thus
>telling the ECU we are no longer in idle mode.
>

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