Fuel starvation typically happens during higher speed turns. Never heard of it happening on hard acceleration; although if the tank is low enough I could see it happening.
When you say "hard acceleration" are you "mashing" the pedal or gradually increasing it? If there are no codes, I can't imagine what it may be. Try putting a bottle of Sea Foam in it. There may have been some carbon build-up (during the winter daily driving) in the cylinders/valves that may be the problem. I've been using Sea Foam for A LOT of years with great results.
Let us know if you find anything...
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mults
40th Anniversary 'Z', 312.06HP/260.58TQ (Dynosty EcuTek Tune)
Build Date/Number: 1/27/2010 #706
Berk HFC + CBE, R2C CAI, Clear Bra, Cleveland Z Club
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