Rough Idle, smell of gas in exhaust, less power than normal... water in gas seems wrong diagnosis

Power/Fuel
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6

If you still have low power after two tanks, I’d suspect that your fuel filter is partially clogged from whatever junk was in the gas (besides any water). If you plan on keeping the car for a while, it might be a good idea to change the fuel filter, do a fuel pressure test, and change the plugs if they’re anywhere near due.