[RSFreak]

When going up fairly steep hills, my engine makes a ticking noise that sounds like the lifters aren't getting oil. Also sounds like detonation or "knock". Anyone know what this is and why it only happens going up hills?

 

[wjc]

I don't know about the lifter tick, but the Vulcan are famous for intake gasket leaks, leaking/collapsed PCV lines, and plugged EGR passages.