power will cut out and instantly come back, it is a fairly violent shake. The check engine light will come on but not every time it happens. it will go off when I turn the truck off and restart it. There is a slight loss of power when the symptoms start. I have replaced the camshaft position sensor and symptoms went away for a while and have come back. fuel filter is clean and has been replaced, acts like an electrical short. Seems to happen most in cooler weather but not all the time.