the wonderfull check engine light came on awile ago and of coarse it time to give NY its money for a inspection so went to autozone to find out engine light problems and it gave me four code,P1153,P0154,P0300,P0449 it has 135,000 miles on it and doese have a misfire you can hear when ideling did the the hole tune up plugs,wires,fuel filter, air filter, and changed oil, i did notice when chageing plugs that 2 of them were black and the rest looked normal and the 2 black ones were across from each other in the motor, any one have any ideas were to start