Hey i have an 03 Oz. Im deployed right now so my wife has the car. She recently changed the battery and hooked it up backwards.... I know women. But the car wont start now. She took it to a mechanic but he couldnt figure it out. He told her to try changing the front ecu chip so she did and still nothing . He checked fuses, fuel pump, spark plugs, the basic stuff but still no luck. Any ideas. Thanks