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Your MAF readings are a bit on the lower side which should cause lean condition instead of rich.
There are three different revision of maf for e-gas cars, ending 00, 01 and 02.
If you change the version you need your DME flashed to match the new MAF sensor.
Or so I've heard.
With MAF unplugged your DME uses a default map which only uses O2 sensors and the throttle position to estimate amount of fuel needed.
It's not recommended to drive long distances with MAF unplugged but let's say half an hour shouldn't hurt anything.
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