Just wanted to tell everone THANK'S for all the help and advice on the Code 13 problem. I finally got the problem fixed. I started pulling the wiring harness, And found that a ground wire on the back of the left (driver's) side head was pulled out of the connector. Just so everyone will know there are 2 ground connector's on that side, With 2 wire's in each connector. I thoght most of the ground's was on the other head. And I also thought there was only one wire per connector. But anyway's that was the whole problem. And again THANK'S for all the help.