i have the same problems that started after sitting, it only happens on my car when its warm out but I checked the fuel pressure under load to verify the pump wasn't cutting out, I checked all the wiring to the maf from the ecu with no issues, changed the maf, still the same. my cars an hour away so I'm in the same boat. I think its the ECU but I haven't had a chance to change it yet. let me know what you find!
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