Hey guys we'll this is wht hapend. It has no spark changed. Coils n plugs n checkd al grounds. Wht we did was built a new motor. Old one spun bearings. Its a jdm f20. Put ap2 crank n rods. Ap1 pist al new rings n bearings. Fresh head with supertech flat valves dual springs n ret. And ap2 intak cam n ap1 ext (gave it to a freind cus I'm planing on geting biger cams). Botom end was asembled by the machine shop n rest by us. That's prety much. It. The orignal motor ran fine. Just spun bearings. That prety much the story just short.
Wht could cause it not to hav spark and not run. Any ideas anything I could have missed. Help me out here I'd realy apricate it.

 

Did you check for spark at more than one coil?

Can you translate this into english:
"It has no spark changed. Coils n plugs n checkd al grounds."

 

what year ap2 were the engine parts out of?

 

What valve cover did you use? IIRC the 04+ (or 06+?) has different cam angle sensors (only one) that will not work with the AP1 ECU.

Otherwise... it would have to be a wiring issue unless you didn't put the cam angle sensor plates on the cams.

 

Yeah, the cam sensor plates are different 06 and up and the crank wheel is also different.

 

Almost every no spark thread I see involved a motor that was taken apart.

#1. CAM timing

 

if cam timing is off there won't be spark?

 

make sure the ground wires are all connected, the main one at the rear of the head is famous for being missed when an engine is replaced.