Hey Folks, Been having a couple of concerns about my 6.2. The engine is making sharp erratic ticking noises at idle and under light throttle. The noise goes away under half throttle though. I tend to think that A) the glowplugs are caked with carbon and are causing the ticking (detonation/preignition?) or B) My injectors are leaking air back into the injection system or C) Both. I am not very knowledgable about Diesels yet, so any assistance would be a great help. Ever Been Dirty Rotten Filthy Stinkin' Stuck?