Flooding is a part of life with these cars.
Even the newer RX-8's do it.
It's due to "bad programming" in the stock ECU - nothing you can do about it unless you remove / replace it.
Low(er) compression and / or low voltage problems makes this worse.
That "half power" is probably due to one set of spark plugs on one rotor being fouled so bad from flooding that it doesn't fire anymore.
Basically, it's running on one rotor, so you're right about "half" power...literally.
Once all that gasoline is burned off the fouled spark plug, the engine will run like nothing happened.
-Ted
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