How about the P3 sense line? Or what ever GE is tapping for a ref on this eng? How about the flow divider? And you are For sure the FCU is good? Sounds like a fuel scheduling issue to me.(sounds like you might have a leak in a control bellows, and not allowing the eng to accelerate as needed) Cleaning and flowing the nozzles might be a good idea, if you have the equipment available. Oh yeah, for the record, most tech reps are useless. And if someone tells you otherwise, they are probally so dumb that they are going to be a tech rep soon anyway.