okay, the pcv checked out fine, i changed the fuel filter, changed the oxygen sensor, all the spark plugs and wires are new, the starter is good and so is the battery. i'm out of ideas. i was told to check the fuel injectors and something about an ecu (whatever that is) and the distributor caps. um there's also a backfire from somewhere under the engine i was told that is possibly the exhaust manifold. also i was told something about checking the spark plugs with a screw driver somehow but i got confused about the procedure. anyone got any ideas or help on what i should do? i need to at least get the car able to run by tomorrow night cuz i commute to college and need to be at class. this is top priority for me. please help.