i have an issue with my 90 hatch dx converted to si. code 1 keeps comming up and goes away when i turn the car off but comes back on after cars driving for a lil while. everything works on it except the o2 sensor. i have replaced the o2 and cleared the computer, didnt work. i ran a wire from the o2 to the computer, reseted the computer and.. didnt work! what else can i do? can there be some other problem that can cause code 1 to come up? any help is apreciated, this 02 sensor problem is killing my gas!!