Mouse chewed number 3 injector wires. Didn't know it til engine was running and badly missing and overloading. Opened the hood and found the nest. I repaired the chew on the wires and still have the same code and there is now gas leaking from somewhere around the back of the engine when the injector plug is plugged up. I traded injectors out hoping that would cause a difference. No it didn't.I am now afraid the computer is fried and a head gasket is blown. Please, any suggestions?