grubbworm

I bpoght a 99 grand limited with a blown motor.repaced with a 20004.7 that was crashed hard to the front of the engine.replace timing chains cam gear and retimed.after install it will start and run {barley}it acts like it is only running on 4 cyc, I can pull the coil pack off the driver side and it does not change the engine .but pull one on pass side and it kills it.ive changed the cam and crank sensors.its not throwing any codes.im leaning at the ecm but checking to see if anyone has ideas about it thank you