your cause of the slow starting and bogging down. Pressure at idle should be 37psi, with throttle open it should be 44psi.
If you've disconnected the neg. battery cable for 10 minutes after relocating your knock sensor and you still have the code 34, then check the wiring leading to the knock sensor harness connector off the main harness, it may be broken and need to be spliced back together.
Noise sounds like something is hitting the timing belt covers or fan.