Andrew,
       o2 sensor should compensate for the higher
elevation.   I would suggest you take the time to do a
pressure test of each cylinder while you replace the
plugs.   May be informative.  gary
Date:    Mon, 8 Jul 2002 09:34:11 -0600
From:    Andrew Fox <afox@CNR.COLOSTATE.EDU>
Subject: High elevation adjustments?

I routinely drive my van at elevations ranging from
5,000-14,000 feet
here
in Colorado.  Above about 8,000 feet i experience loss
of power such
that
I am only able to maintain about 30 mph while keeping
the engine
floored
in second gear.  I know its a crime but i routinely
drive my van with
my
foot to the floor for a half hour or longer while
going uphill in
second
gear (auto tranny).  So my question is are there any
adjustments I can
make to have a better high elevation driving
experience?  Any Colorado
listees out there that can tell me if they get better
or worse
performance
on some of Colorado's steep/high highways (ie I-70)?
Going east up to
the
eisenhower tunnel on I-70 my max speed is about 30 MPH
(second gear,
foot
to the floor, 2.1L, AT).

Thanks,
Andrew Fox
86 Westy
Ft. Collins CO

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