I've noticed now that (finally) I've cleared all the cels on my car, my engine block ticks a bit and it gets higher and lower dependant on rpm. I talked to my mechanic and he said it was that I was low on oil, which I wasn't. Then he said it was the valves. Since i'm planning to do a cam/valve/spring upgrade in the near future, will they last for a couple months or so? Could this ticking be the pistons in some shape or form? Also lastly, could it be a timing issue (too rich)? I'll post a video later on today and hopefully clear it up; I dunno how well my iPhone can video and sound record, but it's the best I got. Speculation is encouraged.