Vibration noise on cold start up.

[David Montgomery]

I have a 24 Perf 6mt and when I start it up cold I hear a loud vibration type noise. It almost sounds like a resonator is loose somewhere. After about 10 seconds the sound goes away and the engine evens out. Does anyone know what it is or have you experienced the same thing?

 

[Howdog70]

I have a 24 Nismo. With stock exhaust, it resonates something fierce. With the nismo track exhaust, it makes a different noise that sounds like it's coming from the speakers. Yes, my noise-cancel BS is turned off already....

 

[VR30Infection]

I have a 24 Perf 6mt and when I start it up cold I hear a loud vibration type noise. It almost sounds like a resonator is loose somewhere. After about 10 seconds the sound goes away and the engine evens out. Does anyone know what it is or have you experienced the same thing?

I believe you’re hearing the waste gates wide open upon cold start.

 

[RobotAZ]

I hear a rattle like sound for a couple seconds and it sounds like it’s coming from behind the engine and in the header area.

 

[ShearMe]

It seems to me like there's an rpm range slightly above idle which causes a resonance in the hatch area. In certain conditions, I've heard this buzz until fully warmed up. Cold outside, A/C load, parked on the right sized hill.... not sure what combination is the trick.

 

[weissk93]

When my engine turns on (first time in the morning) and on wide open throttle I get some sort of vibration in the trunk area that I can hear which is annoying. I recently did sound deadening on the metal in the trunk. I am not sure if it is the trunk release actuator or some other part of the trim. Any thoughts?