I have a 2006 taurus se v6 3.0. had the engine light checked and received the P0300 codes. Had ignition coil changed about a month ago and the spark plugs were changed last year. Sparks plugs are bosch platinum (i think). Car hesitates when not warmed up but really hesitates when I turn on the A/C. Need to change the fuel filter as i just hit 100k miles and thinking about changing the spark plugs as I was told by 2 people, including the auto parts store, why i was using Bosch spark plugs. Car was running great for about 9-12 months then started acting up again after the replacements. Any suggestions on what else it could be.