ok, just finished playing with it......dont know how id hook up a scanner, theres no plug that i can find. be that as it may......number 4 cyl wasnt firing, because of shoddy wiring on the injector plug. fixed that, its quite a bit better, but still wont go past 5200.....did notice that the knock sensor is NOT hooked up, wire is broken.....would that do it? i know it doesent help.