I purchased a 93 grand cherokee. A rat had chewed the wires off the ejectors on the left side of the 318 motor. After repairing the wires (splices) it is sill flooding out (white smoke). If you connect a test light to the ejector wires, the light does not blink like it is suppose to on just one of the cylendars. I had a mechanic tell me one of the wires had to be broken somewhere and to strip the harness all the way back to the computer. My question is can something else cause this beside a bad wire?