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Also, remember that MAF is a reading of the amount of air entering the engine. If you have a backflow issues (high backpressure) or even a timing issue where the valves are not opening and closing at the correct time (slack chains, jumped timing), your MAF sensor readings will reflect this as well. I know this post is late, but any who are looking into this ...
Usually when I see multiple things going dead and the gauges stop working like you stated, the first thing I think of is some sort of grounding issue. Hard to diagnose ... even harder to track down.
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