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Bro,
I?m not tuning an lt1, this is a factory stock lt4 in a z06. I appreciate what you said and somethings apply, but the factory parts ought to be sufficient at supplying enough fuel? This thing...

here is a log of my situation.

I'll upload the file when I get home. My car is bone stock is the problem. 2015 z06, no mods.

'm obviously a newbie, and the main reason I bought the tuner was to troubleshoot this problem.

what ended up solving this? I have the same problem and have just replaced the High pressure pump. Still losing pressure above 5900rpm