i swapped a obd2b b20vtec into a 91 dx. Now it barely starts and does not hold idle. the **** misfires like a mother.
it has to be fuel or spark. i replaced the rotor, cap, wires, ignition coil and plugs. still no dice.


i noticed that on the injectors there is a (+) positive symbol on the side of it. The side with that symbol is where the ground wire goes (colored wires.blue,red,yellow,brown). is the power supposed to be running to those wires?

that might be one of the reasons why this thing doesnt really start.

 

Did you use the connectors from the obd2 harness. I never noticed any plusor minus signs. The yellow and black is 12v ignition switch on and each individual color wire is grounded by the ecu. You are not running a resistor box correct?

 

correct. i still cant find the reason for this misfire/no start problem