long story short. my check engine light is on due to what the computer is saying is a bad iac, ect, amm, and o2. the service engine light comes on for the first five minutes or so after starting it also. engine runs rough with no pickup and horrible gas milage. i replaced all of the sensors, and the computer still says these parts are bad. the check engine and sevice engine light are also still on. i checked the coils, and found the fourth one from the front of the car to be getting no signal. the previous owner replaced all of the connectors, so this is probably not the problem. is there any other known places where the wiring goes bad? anything else that would make my dummy lights go on? could this coil getting no signal cause al of these codes to come up? thanks for the help, jason