I might be a bit useless here, but have you checked the basics?  Plugs, plug
wires, dizzy cap, rotor button?

Once in the middle of my summer trip my Westy sputtered and bucked.  I said
my prayers, checked my AAA coverage while clutching my rosary only to find
fouled plugs.  I had my old plugs as a backup so I swapped them and was
merrily on the way once again... until my left front tire blew a belt 200
miles later.  Sooo.... if THAT helps...

On Thu, May 1, 2008 at 5:15 PM, John Drew <john.p.drew@gmail.com> wrote:

>
>
> After driving 150 miles or so (yesterday), we reached a slightly higher
> altitude along the southern state line between N. Mexico and Arizona (at
> one
> point I think we nearly hit 6000 feet), the car started to occasionally
> lurch, as if it were running out of gas (the tank was full and there were
> no
> gas leaks however).