I bought a 2009 2.4 Avenger about a month ago from a lady thats owned it new and drove it back and forth to the steel mill everyday. The car to me had seemed to run fine until a week ago i backed out of my drive and got about 100ft when the engine light came on and the car spit and sputtered wouldn't go over 30 and died at the stop. Hooked the scanner up came up crank sensor and multiple misfire. After 2 crank sensors and the cam sensor the car ran fine no light for about 20 miles then the same thing all over again the engine light then started flashing which put the car in limp mode. I have now also replaced all 4 plugs and coils to each one and both air filters to NO AVAIL..car starts great and runs good for about 15 seconds then either bogs down and runs horribly rough or just dies scanner only reads multiple misfire now....i don't know what to do now can someone PLEASE PLEASE help me figure this out?! Anything would be greatly appreciated!