my truck is acting like something has a hold of it when i go to hit the gas in gear revs perfect in neutral when i go to take off it acts like it has no power like it used to and it doesnt wanna have oil pressure when it sits over night.....the gauge doesnt come on right away rev it to like 2 grand and sometimes it comes right up and when i turn my head lights on the gauge goes up a lil....i think thats a bad ops....there is more vibration that usual also?