red 95 z28 lt1

i posted hear a while ago about my car not idleing at all with open headers and all the new mods in the sig, i could barley drive the car it did not want to run well at low rpms and when i checked the plugs after they were black, so yesterday i installed my jet hot coated y pipe and tried to start her up, no luck, then this morning i checked the plugs and they were black and fuel soaked, so i cleaned them up and put them back in and it fired right up and within a few seconds it was running better and held a idle after 30 seconds of running at 1000 rpm,
i think open headers was not creating enough backpressure or possibley messing up the o2 sensors , i got to get some vids up soon