I did an OBD0-OBD1 conversion in my 1990 civic for my B17 swap. THe car ran fine for 2 days. Now I have no spark or no fuel to the injectors. Any ideas?

 

well i would start with basic checks, like testing the coil. checking your cap, rotor ect...
as far as fuel, listen for your fuel pump to prime the lines, alot of times the fuel pump relays go bad. again im not saying it is any of these things. but these are basic checks you can preform to rule out some factors that could be leading to your problems. also double and triple check the harness for obd 0 to obd 1 and make sure non of the wires fell out.
hope that helps
-sander

 

I replaced the cap and rotor and plugs. How do I test the coil? Could it also be the main relay?

 

I am sure it is your coil, replace it and your problem will be gone.

 

Are the B series coils any different than the D series coil? I have 2 D series coils laying around.

 

Are you sure the ECU and the Injectors you are using are compatible?
Meaning, do you or do you not have a resistor box installed?
This might be causing a problem.....no?

 

yes i was also thinking about the resistor box/injector thing.

but it could be a couple other things that were already mentioned too.