I have a friend with a gsr swap in his eg , I believe its a 97 gsr ....anywho when he first cranks up he has a nasty knocking sound , then goes away at idle BUT when you start reving it starts knocking again .....I've narrowed it down to clyinder 2 , we checked the rod bearings and they are good , Now when I kill the injector for cylinder 2 it goes away ....... I believe its spark knock or faulty injector......anybody got any advice? Any input, any help? Thanks