I'm stumped. Truck died on the road. Showing rpm movement when cranking. I've replaced ipr, icp, hpop. Not getting more than 400psi cranking. I was told maybe injector orings, but I cant see where there is any oil escaping from the injectors. All buzz good. Cranks fast. Could there be a pcm issue? Ive ohmed about everything I can but the pcm. Pcm is a reman and not that old. I run a hydra chip also. But a side note, when my chip is plugged in, my gpr wont kick on. Could I have a ground issue somewhere causing my ipr to still not work properly? The plug reads .3v on one side and 12.7v on the other. I'm just soooo flustered right not I cant take it. Dont want to keep throwing money and parts at it to still get nowhere.