I have a light clattering noise between 1k & 2k Rpms. You dont hear it under 1K & over 2k. When I lightly push the throttle & the RPMS holds in between that range is you hear it. If I rev it up with more throttle you dont hear it between the RPM Range, but when the RPMs drop you hear it in the 1-2k range. It sounds like it's coming from the rear of the engine. You can barely hear it in the car & once the engine get up to operating temp it goes away. So IDK if it lifters, detonation or what. Its weird. I will get a video later of it. It was doing it when I first got the car 2 months ago, and it did it after my oil change. It also seem like it got louder when my mom put 87 in my car (which I NEVER do). So any help would be apprecitated.
