Wow. So when you say no codes, does that mean that you checked with a code reader? Did you notice the coolant dots go past half way? Was the oil temp in the 240-260 range? Do you have some suspect wiring going on behind your dash?
There are plenty of things that can send this car into limp mode.
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 2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL
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