I have a 1999 Taurus with a 3.0 V6. It has been sitting for about 2 years, but I recently put a new battery in it and it started right up. Ran great for about 2 days then started idling rough and check engine light started flashing. Did a compression check and had no pressure in #6. Took the valve cover off and found the push rod for #6 intake valve lodged off to the side of the rocker arm. Any ideas why this would happen or what I should do other than put the push rod back where it goes and button it back up?