yea i would check out the 02 sensor. thats the first thing that i went to when i was running rich. i noticed that i was getting really crappy mileage. so i popped in a new one, and its sooo much better. (well not anymore cuz my HG blew, so its not moving haha). but when i changed it, it made a huge difference. i converted the mpg figures, and i should average about 400kms per tank. and i get better than that now. almost 450, so im pretty happy about it all.
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