B18c1 no start. Help!

[Nathfest]

I (hopefully) am nearing completion of what has become a 2 month project of installing a 95 GSR engine, along with all the dash wiring into my 97 Civic EX. I have tried to start it and the starter motor turns it over but won't start.

-I used the noid tester lights and they flash, so I'm assuming fuel delivery is okay.

-Spark is there, but last time I checked it , it did seem a little weak and/or inconsistent.

Could weak spark cause it not to start? I'm wondering if it could possibly be a bad ECU, the car was in a fire and the ecu didn't get touched but I'm wondering if all the heat could have still fried something.
I made it this far, could you guys please help me out, give me some advice on anything else I might check, anything at all. My car is my life, and I'm out of a job currently.

[b18ceg]

yes. check the ecu as a faulty one would cause the car not to start. secound i would check the fuel pump, timing, and the dist, all these would cause the car not to crank.

[Greenblurr93]

turn the key to the On position but dont start it.. does your CEL go off when the main relay clicks? If it doesnt then heck what code/codes your throwing and let us know... weak/irratic spark is usually a faulty ignitor inside your distributor