I noticed recently that when my jeep is under a load it sounds like it's missfiring when I try to accelerate quickly. It sounds like my lifters (i think it's this) is clicking. It sounded at first like an exhaust leak but it only does it when i'm driving and I really try to accelerate. Doesn't do it when it's just sitting still though and I rev the engine. How can I fix this, or does it need to be adjusted is all? Any help is apperciated, thanks.

- Kotrin