I set the timing to 0 with the brown and black wire unpluged. After each replacement I disconnect the battery to reset the computer. I have replaced everything: all sensors including temp sensor, map, egr,etc. I have also replaced distributor, injectors, fuel pump, filter, computer, spark plugs, cap and rotor. The engine seems to run good but gradually over a day or so it starts running bad, surging, missing and not wanting to take off from a dead stop. It showed a code 42 once or twice but infrequently, now it shows no code. I am concerned with this problem as I am going to install a new stroker motor next weekend and if my problem is electrical I dont want to have it in the new motor. 