I have a 2004 crossfire with 77,000 miles and when I try to start it, it turns over but fails to start or when it does start it begins to sputter and try's to die (sometimes it does) and when it is idling it sounds like it is misfiring; also when I press the gas pedal it will not raise the RPM's and begins to sputter also. I have replaced the fuel filter and pump thinking that was what was wrong. I also have to codes that show up P0175 and P0730. I have searched the forums and have found a lot of talk about the Crankshaft Position Sensor but it wont even crank after a full day of not touching it. I am leaning to my Ignition Coils and so is my mechanic. I need some help because the Crankshaft Position Sensor only cost $55 and the ignition coils are $1200. Has any one else had this problem and figured out what is going on.