ok long story short ive had a missfire thats unbearable:good fuel pressure,new opti,accel coil,good ICM,new ngk tr55,new taylor otvc.now when i went under the car i noticed my pass side o2 sensor harnes was severly burnt both of the harnesses had holes in them from heat and the metal prongs were black.they were bosch o2 now i have ac delco and what i did was cut the harnesses off the o2 sensor and the harness that clips into the o2 sensor and splice the wires together and used heat wrap around the wires to keep moisture out.now after 15 sec after start up i throw an ses code which i never threw before this.someone mentioned i could have messed up the resistance or sumthin but i had no choice.theres only 4 wires to splice with each other does anyone know which ones match to what??maybe i got 2 mixed up??

 

Save yourself some trouble, go buy new harnesses

 

see thats my problem,turns out that the o2 harness is part of the main harness system which is alot of dough.