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Re: Taurus 2007 rough idle
P0300 is a random misfire code. How many miles are on it and has it had a tune up?
On the 2007, my initial thought would be an IAC servo or possibly the EGR, but 2007 and 30k miles seems a bit premature for either of those. You might start by adding a bottle of fuel injector cleaner to the fuel tank.
-Rod
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