Please help me I cant find a good site that tells me the diagnostic procedures for my 1990 RB20E a31 cefiro. It was running fine one day and the next it seems as tho it has dropped a cylinder, being fuel injected and all electrical it could be a fault anywhere and I would like to see If the computer will tell me whats wrong before I go pulling things apart. It is totally stock standard granpappy spec so its not like the computer has to think about mods. Cheers I hope someone can help me.