Hello everyone,
So it has been a few months since I noticed an engine vibration at a specific rpm. The vibration is some sort of buzzing sound ,of which I can hear inside from the passenger side. The buzzing occurs when I rev the engine to around 1200 RPM in neutral and at the same rate when starting to move the car ( 1st gear , climbing the rpm's to engage the clutch). So I don't know if its something loose vibrating or is it the crank pulley.

Thanks for your help it is getting quite annoying.

In summary: - Buzzing sound at 1200rpm
- Engine sound
- Sound coming from passenger side
- Neutral
- 1st gear from a stop too start moving

 

Heat shield?

FYI, diagnosing vibration sounds over the interwebz is probably the HARDEST to troubleshot.

 

True, can I post a video here ?

 

I remember seeing something about an A/C hard line in the area of the crank pulley that can vibrate and cause something similar to what you describe. IIRC, the solution was to add some kind of weight to the line to dampen that particular vibration issue.

 

Buzzing sounds usually are cabin vibrations. Check the fold down passenger mirror base feet that attach to the headliner. These vibrate at around the same rpm for me.

 

I would do a tune up. Plugs, coils, Fuel Inj cleaner, etc. maybe 1 cyl is not firing as well as the others.

 

Plugs, spark and injectors were checked or changed so I doubt it.