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Subject:Re: 1991 westy - altitude sickness?
From:Robert Stevens
Date:Mon, 20 Jan 2014 15:32:14 -0700
On Jan 20, 2014, at 3:23 PM, Steven Johnson <sjohnso2000@GMAIL.COM> wrote:

On those kind of trips (cross-country or long distance)  I do use 91 octane
as I understood that it tends keep
the heads slightly cooler.

So is this a change in behavior at altitude for your van?
If it is, has it been given a tune up recently, new plugs, rotor,
points, condenser, timing advance set to about 7-10 degrees btdc?
bob