Whistling Noise
11-28-2006, 08:15 PM
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Whistling Noise My car has been making a whistling noise from 1500 rpm to 2000 rpm,sometimes. It only began after i installed the headers on the car and i have replaced the exhaust manifold gaskets twice so these are not leaking. Also i put ultra copper rtv silicone around all areas that my y slid in then band clamped them all. Has any one ever experienced this before and any ideas what it could be. Maybe the muffler going bad or something? I have mods in sig. Thanx
11-30-2006, 04:27 PM
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Won't make the noise in neutral just revving. I'm using the oem gaskets on it. It only does it occasionally from 1200 - 2000 rpm but it is extremely annoying. Almost sounds like a horn or something. Its definately coming from the exhaust not the rear end. Usually happens just before it shifts.
11-30-2006, 04:50 PM
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friend had that problem and it was one of the polution control lines that was off. i belive it was the AIR pump maybe? the thing you put a breather on when you do a lid. very possible you knocked it off while messing around down there.
11-30-2006, 07:22 PM
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Yeah check the intake/lid, see if the air connection was knocked off. They use cheap plastic connectors that can be brushed apart and allow air in. Usually whistling would be a filter or lid/intake issue. Make sure it is all snug and not letting in any air where it is not supposed too.
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12-01-2006, 11:05 AM
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Yea that would be nice! Merry Christmas! 
Anyway's, i checked the intake and the AIR hookups and everything looked good. Car kinda made this noise a little before but it is much louder since the header install. Hence why i think it might be the muffler. Any other ideas guy's?
Anyway's, i checked the intake and the AIR hookups and everything looked good. Car kinda made this noise a little before but it is much louder since the header install. Hence why i think it might be the muffler. Any other ideas guy's?
12-01-2006, 11:12 AM
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Tighten your header collector clamps. I'll put $$$ on it that's your problem. I did my transmission and I had to yank the Y-pipe, so after I re-installed it, I tightened the clamps, and she's whistling now... It's done it before, I just haven't gotten a chance to mess with it.. It sounds almost like a squeaky belt... Anyoying, but get on it, or crank the radio, and you won't notice it anymore.
EXH leak...
EXH leak...
12-01-2006, 11:26 AM
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Nope not really the sound i hear. It almost sounds like a fog horn or something. But i will check all of the clamps and tighten them again just to be sure.
12-06-2006, 09:33 PM
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I was told by a local muffler shop that the muffler itself is causing the noise. He told me he has had multiple flowmaster exhaust come in making noise and it was the muffler. I want to replace the muffler and i'm considering a hooker aerochamber! Is this a good choice for my set up? What do you guys recommend.
