strange noise on high speedak

[vluzhko]

Hi allI have strange problem in my Q45 1995.

Noise appears when car reaches 100+ speed. It looks like metal to metal, like somebody hooked 2 metal cans under my car or like something not tight properly (in example breaks).

Sound comes from under front-right (under passenger seat). But not sure 100% as I'm sitting in the left seat so everything seems to come from right.

It does not have noise when I drive slow on rough road or speed bump. Also I would not say that it depends on roar surface. ONLY on clear road with speed around 120-130. And it becomes louder with increasing speed.

Any Idea?Is there anything I can examine myself?

[Haitian_King]

Wow. I was going to ask why you were driving so fast and then I realized you were talking about 100 Km/h. (About 60 MPH)

It only happens at that speed? I think that's like (60-80) MPH. Maybe your suspension? How long have you had the car? Did this sound just start?

[vluzhko]

Sorry, forgot to mention that I'm in Canada and it is km/h here.It is 120 km/h - average highway speed

The noise appeared about month ago as slightly noticeable. So at the beginning I did not pay attention. Then I start thinking that I have some bolts loosen in passenger seat as sound was coming from under it. But seat is OK.

Now I'm thinking that it can be some part of exhaust system (muffler). Muffler itself looks OK. May be some metal is touching something and on high speed it meets some strong wind force so it is start making noise.

Sound becoming more and more noticeable and louder every day. But I can still hear it only above 100 km/h, the same as month ago when it just appeared.

I have purchased the car about 6 month ago.

[Kiven422]

I just had a problem like this... For me it was the metal mug gaurd behind the brake rotors making contact with the rotor.... it becomes loud and annoying... maybe check at each wheel?