I think I might know what my problem is but I'm open to ideas...

When I accelerate hard I hear a high pitch whistling/whining sound that's hard to locate, but it sounds like it's coming from the right side maybe toward the back. I know it's not alternator noise from my amp because I know how that sounds and that isn't it. I once put a throttle body spacer on my old truck and it created the same type of noise, so I think this may be intake/exhaust related. My intake is stock except for a K&N drop-in filter. I do have an axle-back exhaust so I'm thinking the gasket where the pipes join my have a small leak or something. Could that make a whistling noise?

Any other ideas of what to check out?

 

I would defiantly look at the gasket to make sure it's not leakin. I had the same problem and that's exactly what it was.

 

Maybe it's the turbo?

 

my intake does this =)


I like it

 

Mine does this, but its because it has a Tenzo R intake. Most vehicles with almost any intake will whistle a little.I have never heard an exhaust leak whistle before...

 

Well, I'm bringing up this old post in case it can help somebody in the future. I got a brand new Borla single exhaust for $123 (I had to jump on that deal). When I removed the previous exhaust I noticed that there was a crush washer/gasket thing that was part of the OEM exhaust. I actually didn't see that and had put on a new gasket with my old replacement exhaust. So basically both of these gaskets were interfering with each other and didn't create a good seal.

I put on the Borla and trashed the old crush gasket. Problem solved - No more whistling and the new exhaust sounds good.

 

Where did you get the borla single exhaust for that price?

 

Whistle when you accelerate? Does it go 'whoo whoo' like an alarm clock in the mornin'? lol

http://www.youtube.com/watch?v=KOeP2xaFg1Q

 

It was a lucky chance thing. I found it on eBay:
http://cgi.ebay.com/ebaymotors/ws/eB...3AIT&viewitem=

I was actually surprised to see it go for so cheap. I just put in an early bid and ended up winning it. The auction only got 74 hits for the entire duration. Crazy once in a lifetime thing...

I was thinking of that exact same thing when I originally posted this thread. haha.

 

Damn, if that other guy didn't bump it to $120, you'd have gotten it for $100! Always feels good to snag a deal like that.

 

i hear the same sound under hard acceleration also but only when im about 90mph or higher. it makes this weird whinning sound i got scared thinking the xb cant take it being pushed that hard. my car is completely stock no intake or exhaust.