My buddy has a nissan frontier 2.4l DOHC 2wd and it has literally NO power and is running super rough. we went a head and changed the plugs and wires and air cleaner just to see if we were havin problems there but they were way passed due to be changed anyway. my first thought was the distributor or maybe the cap and rotary button, but after googleing the problem tons of people have the same problem but with like 4 or 5 different problems. such as intake manifold, exhaust or cat being clogged, distributor cap and rotary button, whole distributor, coil, or just adding oil to a center cylinder to correct compression not sure what to do???
please help