I had a problem at 4500 ft with a Buick. It would sputter and developed a dead miss, much like a fouled plug. Turned around and limped it back to Phoenix, and to the dealer where they kept it overnight. The dealer replaced the plugs, and one plug wire, and it ran fine, until we headed out again and hit 4500 ft. Then same result. At the end, they realized it was the computer that was the real problem and at that altitude, so they changed it out and all was fine from then on. Maybe?????????
Spenser
2005 Stealth Grey SUV
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