I had my jeep in the shop last week for fluid changes and soon after noticed a knocking noise that was coming from the floorboard passenger side area.
You could hear it mostly when idling.
I figured that something was loose and banging about. Well last night I crawled underneath and checked the obvious stuff and all was tight. I then notice that the exhaust pipe leading to the manifold was 1 mm off a section of the undercarriage frame.
I pushed it up a bit higher at the point and apparently this was the problem since no more knocking nose at idle.
Is there a clamp near that pipe that you can tighten up to make sure it doesn't move back down to the frame? I'm afraid that pushing it up higher certainly won't be a permanent fix but, it did fell like the pipe itself was bending a bit when I pushed it off so, maybe it is.