mx54age

Last thread wasn't very much detailed on my problem so here i go again.
I have a 96 Miata. The OG engine started knocking like crazy from the PO which didn't seem to take care of it but I was still running nothing wrong but the knock. I found a used engine at the pick a part replace seals,clutch,water pump,timing belt,etc. I transfer all the sensors from the OG motor cas,maf,cps,coil pack injectors and hooked them all up. Now that I want to start the engine it cranks but no run I have check for fuel and spark and no luck. I'm stuck and I can't seem to figure it out I appreciate all your guys input thanks