Originally Posted by precision32

A collapsed lifter was my first thoughts. Did some research and got informed about 'injector nailing.' Flushed the injectors with SeaFoam with no improvement. Pulled the injectors and had them tested, all are in great shape.

Pulled the valve cover and the chain was loose between the sprocket and the chain guide. Pulled the tensioner and checked it, but it was almost dry as the engine had set for three days and it leaked down. I got a good deal on the chain so I took it. The one that is in the engine looks almost new but looks can be deceiving. Do you have a link to chain stretching? I'd really don't want to change it if I can help it.

Next step is to check all of the lifters. I have a new one in hand to replace what I hope is just one bad lifter.

Thanks for your help.

EDIT: found an article on checking chain stretch. Rather simple. Thanks again.