Hate to hear the news on your Z Austin. Definitely get the MAF's cleaned and looked at. Fuel pumps are another issue but I haven't seen much about coil packs going on here. The mysterious phantom codes that disappear happened with my Z too. Fuel sensor but it cleared a day or two later and they couldn't find it. My fuel gauge was acting funny and I had the dealership check the sensors and yep you guessed it they were bad. Ordered/replaced and my fuel gauge works great now.
Good luck at pinpointing your issue.
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Takeda TR3009P Short Ram Intakes, Custom Dual Exhaust, X-Piped with 18" Resonators & TopSpeed Axle Backs. EVO-R Led Third Foglight,
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