Hey guys i got a fresh engine build woth new rods and piston and new used standered crankshaft and acl bearings and also king main bearings. I know i put everything together right and torque to specs except thr rods, some of the rods i had to loosen because i couldnt turn the crank so its loosen by like 5pounds. Any ways the car idles fine it just has a piston slap. When i rev it ,it sounds good.but when i drive it under load it knocks or piston slaps loud or somthing like that, when i hold it at load it faints away but when i go higher it knocks except when its at 3500-4000rpm it also faints away. Idk if it goes away once its breaks in. Idk if it is a rod or igition timing. Lmk what you think it is or what i should do or if you have questions