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Didn't happen to me on a Porsche, but in a Chevy truck I had the same issue. For me it was the fly by wire control. I was told the fail to idle is the answer to the old Audi 5000 issue where they would accelerate uncontrolled because the failure mode was WOT. I would look there first based on what you wrote. I had an 84 911 that had fuel pressure regulators fail, but the symptoms I had were it stalled when the throttle was pressed. It got the air, but the regulators weren't pressurizing to give it enough gas. Mechanic took a while to figure it out because he told me he had only seen them fail open causing flooding not fuel starvation.
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