today I drove from my house in Cameron Park CA (1200 ft elevation) to Mt Rose, Nevada (8200 ft elevation) to do some skiing, and on the way up there, the check engine light came on, and it became more gutless than before, and it used a lot more fuel. I know it doesnt have an oxygen sensor, but the light didnt come on when I disconnected it and it ran the same (leading me to believe that it wasnt working in the first place). But here is the strange part: most of the time on these things (89-90 models) The engine check light flashes code (for instance, 1 flash followed by 2 shorter ones means 12). but this time, the check engine light stays on continuously, and the chiltons manual says that when the light stays on, it means ECM failure. The thing that puzzles me is that the engine still runs, and when I got back down to the elevation of my home, it ran the same as it always has. I normally wouldnt care about the check engine light being on, but it has to pass smog within a few months, and the cost of a new or reman. computer, plus the cost of an exhaust system make the car too expensive to smog.