i bought and 89 crx and the wiring was all cut into and messed up so i decided to start fresh. I pulled all the cabin and engine wiring out and found a virgin 90 crx auto and pulled all the wiring from it. I then converted the harness to mpfi and wired the dizzy plug to obd1 because i already had a obd1 dizzy and didnt feel like buying another. I have the motor in and most of everything hooked and it is throwing a code 4. It is idling good enough to were it doesnt die but if you even crack the throttle a hair it wants to die. I have triple checked my wiring lol my nice harness is all cut open. I have swapped 2 known good dizzys and 2 ecus and no change. What all can be throwing this code? I dont know where to go from here.

 

Good ECU
Good Distributor
= bad wiring.