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Had a similar experience with my 2003 Lexus. Cleaned MAF, ran much better for a few days then crappy again.
Turned out to be a split intake hose. Split was on the bottom so I couldn't see it. I suspect cleaning the MAF may have just pushed the split more closed temporarily.
With the car idling, spray carb cleaner around hoses and connections. If the idle changes as you spray, you've likely found the problem.
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