Vibration and uneasiness at higher RPMs

[thetaobear]

I am experiencing vibration/engine being uneasy at high RPMs (4K+). It is more noticeable at lower gears (1st, 2nd). The engine just doesn't sound very smooth and happy- I believe coming from the engine bay. I'm lucky to try the same with my 335i, but the 335i seemed a lot smoother. Any possible issues? Would spark plugs/walnut blasting help? Or is this all normal?

N54, JB4, DCI, and performance exhaust.

No errors thrown!

Thanks!

[Helltime]

Originally Posted by thetaobear

I am experiencing vibration/engine being uneasy at high RPMs (4K+). It is more noticeable at lower gears (1st, 2nd). The engine just doesn't sound very smooth and happy- I believe coming from the engine bay. I'm lucky to try the same with my 335i, but the 335i seemed a lot smoother. Any possible issues? Would spark plugs/walnut blasting help? Or is this all normal?

N54, JB4, DCI, and performance exhaust.

Thanks!

That is what happens to me when i lose a coil pack. The first time I thought I broke a drive shaft bolt it vibrated so hard then I saw the engine light and realized it was something else. Are you throwing an engine light? Are you able to pull codes?

[thetaobear]

Hi Helltime,

Thanks for the reply- I don't have any errors thrown (no engine light or codes).

[thetaobear]

Changed just the spark plugs- worked out for me! The engine is now running smooth across all RPMs.