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If the MAF were bad, it would in fact affect both banks, not just one.
You might want to concentrate on the O2 sensors, and any leaks on the intake or exhaust system that might be the cause.
What I can recommend that would be reasonably easy to do, and not cost you a cent, would be to remove the O2 sensors, and switch them from the right bank to the left bank, and vice-versa.
If the fault then changes banks with the O2 sensors, then you know the issue is related to the O2 sensors, and not anything else.
If the fault then goes away, and doesn't come back, then it was probably a connector issue, and disconnecting and relocating them cleared that up.
If the problem stays on the same bank, then you are most likely looking for an intake or exhaust leak.
BC.
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Its not how fast you go, or how expensive your toys are.
Its all about how big your smile is at the end of the day that truly matters.
'98 Silver Boxster, '08 Ducati 848, '89 Honda Hawk GT, '89 Honda Pacific Coast
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