There are two grades of fuel here, Extra and Super. They don't post
the octane rating, but I think Super is 90 or 91. I am running Super,
which is what everybody recommends.
I do feel that there is a problem somewhere else. With a computer
controlled ignition, the computer should take care of the timing. I
drove my Dodge Caravan to the top of Pikes Peak, and other then not a
lot of power at that altitude, it ran great. So 9000 ft shouldn't be a
EGR and Knock sensor seem to be the logical places to look, but can
anyone tell me how to check them?