i have a 1995 nissan maxima 3.0 engine.. I just replaced the water pump,thermostat and timing chain. When i put everything back together the car started fine. However it seems like i am not getting any power or spark to 3 of my coil packs.. Drives very sluggish feels like im in a 3 cylinder... Anyone have any sugesstions. I was wondering if theres a fuse or relay that controls the power to coil packs....