2003 Honda S2000 flutter noise.

Trying to pinpoint a fluttering noise coming from the under side of my s2000 under acceleration and rev.

[el-hplj]

lol yea bro what was it. I go same sound after header install

[crobergecourtier]

I have the same sound, dont know where it come from

[bergi]

I know this was a while ago, but did you figure out where the noise was coming from? Mine has a very similar sound.

[Madsupervilian]

it's been a year now, so what was it?

[stevensrise]

did you ever figure out what the problem was?? im thinking it might be a lose vacuum line or maybe a fouled sparkplug.

[majorpootie]

Did you figure this out? mine makes the same noise right now