Hi, I spent hours on the forum searching for a similar issue to no avail. So decided to post my problem.

Car info:
G37 Sport Coupe
Manual Transmission
92k miles

I hear a slight tick/knock when I'm in the rev range of 3000. It only happens when I'm in gear. If I rev the engine out of gear, there's no weird sounds. I've actually been having this issue for about a year now. But there's no difference in performance or anything, just annoying and was finally able to pin point exactly when it happens. I only use Premium Unleaded gas and Mobil-1 Fully Synthetic oil.

Any information helps!

 

Maybe tune up the AF ratio? Seb noticed a little bit of knocking around that range for my car as well and he tuned the AF ratio to be a bit richer.

If you're just asking if this is normal, I can tell you that it is not abnormal.

I know people are going to disagree with me again, but my trusted source (Specialty-Z) claims our cars are tuned for 93. Sure they'll run on 91, and they'll even run on 87; but that's not what's best for a high compression engine.

 

how about posting an audio clip of the noise? ticking and knocking noises are totally different in tone. is it a tick or is it a knock? hard for anyone to identify what is normal or abnormal or not abnormal just by reading your description since you also claim the noise is not there when revving engine while out of gear.