The Pig is at my folks house, I was barely able to get there. What are the symptoms of a collapsed lifter in a Chevy TBI 350? I can hear an odd sound from the number 5 area, it revs up then nearly dies. I have no power. The sounds seems to get better after it has ran a bit, like the lifter has pumped up, but the motor still runs like crap. This just started, my only complaint was a fast idle and an exhaust donut that gave it up. I just replaced it with a sintered metal kind and no issues or leaks..................then this happens Any ideas or comments would be very appreciated.