i just swapped an lsvtec into a 90 dx hatch and it wont start. it had a runing d15 with an mpfi conversion so i know its not a problem with that. i did an obd1 conversion with a new conversion harness which i tested on another car and also a chipped ecu which was also tested and working. the dist. wiring is also right and the dist works, firing order is right. the injectors are also firing. all the grounds are hooked up and the wiring is all hooked up. the cam timing is perfect aswell as the valve adjustment. it has 38psi of fuel pressure and the main relay is fine aswell as the resistor box. all fuses are good. i checked everything! the only way we can get it to idle is by pouring a little fuel through the brake booster line or starting fluid, so i dont understand why it wont run just off the injectors????

 

I'm not sure but I think that an OBD-1 ecu will not register for OBD-0 injectors/injector plugs. Try some different injectors and make sure all your plugs to your ecu are in all the way. (I had a problem in my 88 hatch where one of the plugs came out of the ecu and car wouldn't start like it wasn't getting fuel.) I hope this helps. keep me updated. -Jason

 

it also has obd1 injectors. we used both sets (obd0 and obd1) and both fired but i put in the obd1 ones because they are a little newer.

 

The problem I guarantee is that you are using a resistor box with OBD1 injectors!!!!!!!

either swap out the injectors for OBD0 (or any other peak & hold type), or remove the resistor box and wire directly to the injector plugs.

The impedance is too high, your ecu will not ground out the injectors. OBD1 injectors are already high-impedance (saturated type) thus no need for resistor box. OBD0 are low-impedance so they added the resistor box so the ecu would see the proper load. You are now outside the operating load range for the ecu.

Pull the box out and tie in all 4 positive injector leads to the power wire that was going to the resistor box.

 

Yup, I went with 92-96 prelude h22 ones. they work great for me. good advice.