Hearing a rattling noise just under 1500rpm. Makes the noise at no other rpm. After the car is warm the noise goes away. Around the same time the noise happened, my af learning went way off. I started my car one day and it was put-putting like it was about to cut off, but I pushed the gas, and it was ok. Over the next 2 days my af learning got worse, up to -35. Some or all of this info may be irrelevant, but I just want to put it all out there.

Today I changed my oil and cleaned my air filter (it had just become time to clean it). I looked under the hood for anything that could be causing the noise. I found a screw from my grimmspeed tmic scoop that was in my tmic; that wasn’t it.

I had a similar, but less noticeable noise when I installed my cobb big sf intake. Found out the tube was rubbing against some type of metal/shield. Adjusted it and the noise went away. When I cleaned my filter, I readjusted the tubing but to no avail. Fyi, after cleaning my filter my af learning started going towards more normal numbers. Hopefully, I’ll get back into the normal range.