After that I had a road trip to Utah. It was a long drive and my fuel stops were quite frequent. And I was boasting a solid 13-14 mpg the whole trip (do to the higher speed limit and big hills) when I got down I noticed my engibe was running quite rough. I was having the same problem before and thought it was the ignition rotor cause they do tend to fail in the xterras and when I replaced the dizzy it made little difference. So when I was in Utah I thought that maybe I had a leaky egr valve. So I deleted the egr and the engine ran smoother and on the way back I started getting 16-17 mpg the whole trip which was a welcome change.
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