Hi, I have been struggling with an unstable idle. It is very cyclic and the
cycles and frequency increase with an electric load (fans etc.)  With the O2
sensor and temp sensor replaced, and other tuneup adjustments made, the VW
dealership claims I need a mass airflow sensor.  This was determined without
any computer diagnostics.  In fact the dealer's service department says that
their new computer testing equipment no longer can test our obsolete
Vanagons.

I don't have a lot of faith in them, so do you have any ideas of whether
they are right and what I should test next?  I made a cursory review of the
archives over a couple of recent years, without finding this exact problem
described.
Thanks, Jeff Hartman
Juneau, Alaska
86 2.1 Vanagon

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