My K20a2 with a prb and immobilizer box in my crx started and ran numerous times. It sounded strong and ran well. I re attached my dashboard and connected the dashboard connecters to the fuse box, connected the primary o2 sensor and went to start the engine. The fuel pump primed, and the starter briefly cranked then shut off. I replaced the main relay to no avail. Turns out I blew under dash fuse #14. I ended up attaching the ground of the main relay directly to a ground and the ignition connector directly to a switched 12v source that activates when the key is in the on/start position. The fuel pump switched on and the A13/A15 wires received 12v. The engine cranked but wasn’t getting spark. What is going on here? Why did it work but now doesn’t? I didn’t change anything.

 

Hybrid Racing told me they may have screwed my harness up. That they put the wrong wires in the incorrect pins

 

this would probally be your problem, but if your conversion harness is backwards i dont think it would have startedat all, if you are not getting spark your ecu may not have power or may have fried the ecu check under hood fuse box ecu fuse

 

This may be irrelevant but maybe one of the wires got pinched when you reattached your dash I messed up my wire harness in one of my old cars when changing out my carpet so that mite be an area to check just an idea

 

Thats what I thought but they told me it may have still started. I checked all fuses today both under hood and under dash.

Good idea but I doubt it I was real careful. Also the dash goes above where I have all the wiring. Everything is worth checking out though. I'll go take a look

 

No damaged wires