Hi
a while ago , After shop installed a racer x Charge pipe, hybrid turbo, and 3port BCS, I developed a rattling sound (like metal on plastic , or some metal in a can sound)
Things ive observed when the sound comes on.
1. under 2100rpm
2. off boost , goes away as boost starts after about 2100rpm (noticed boost target on bttsm app under 0.7 psi when sound is on)
3. car is usually under load from 3rd, 4th, or 5th gear.
4. This sound has sometimes triggered FLKC on my btssm app, on one night i tested, every time the rattle came on, the flkc got triggered to -1 or so.
i can keep the sound constant if i stay around the 2100rpm range and under load.
Most likely not the engine and turbo as i have since installed new engine and now have the stock turbo and the sound is still there.
Although Racer X pipe is very close to brake lines and air box, i have put rubber in between all possible hitting points and the sound is still there. So dont think charge pipe is hitting anything.
I have noticed slight fuel smell in cabin area. But there are no exhaust and Air leaks AFAIK as everything was tested after new engine and tuning
I am seeing the mechanic soon for the first service after engine was installed, i would like to hear your suggestions as to what it could be so i can mention it to them
Could it somehow be boost controller related? Or torque converter bearing?