At 09:55 AM 7/16/2006 -0700, Loren Busch wrote:
>Problem was defined by disconnecting the O2 sensor, ran great then but very
>rich.

Aye.  Diagnosing pretty much any running problem ought to start by
getting the system into open loop.  If the sensor isn't causing the
problem itself, it's doing its best to cover it up or confuse it.

>   Adjusted throttle switch, ran
>like a dream since.  Some indication now of throttle switch slightly out of
>adjustment but not a major issue.

Did VW break this when they went to the single switch?  The
adjustment on mine is pretty much a life-of-the-engine sort of
thing.  I had a little problem with the switch itself needing a shot
of contact cleaner once, possibly because the boot around the
operating pin perished and cracked.

>I only mentioned this because no one has mentioned throttle switch
>adjustment as possible cause of the 'long hesitation when stepping on the
>gas'.

Isn't it more like a convulsion?  Engine stops running when it hits
1500 rpm and you become the out-of-phase mass that keeps stabbing the
throttle so you go hop hop hop hop down the road...or does it have
more subtle manifestations?

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage," '85 GL "Poor Relation"