Periodically noticing that my throttle is sticking. I put a new cable on it years ago, however i wonder if this is a cable issue of pump problem. This truck also recently started making a noticeably louder ticking noise. Not sure if they're related or not??? I bought a new set of CDD "stock" injectors however have not installed them yet. Seems to run great, so no functionality problems, just the tick and occasional throttle sticking. For quite a few years I did run a lot of WMO mixture in this engine however haven't for several years now. Any ideas? Thinking about dumping a quart of AFT in one tank and see if that has any affect.