Chargepipe or intake air leak? (Video)

[boba7523]

Hey guys,

I just replaced my spark plugs on my S55 and had to remove the air intake box and two chargepipes. After putting everything back in, car drives fine with no loss in power, and it seems to build boost into the 19psi (I'm on Burger Tuning stage 1).

However, I noticed a whiney sound coming from the engine area when I let go of the gas pedal and only when I WOT. If I slowly rev up to 7.5k RPM, it doesn't have make that sound on when I let go of gas. I have stock intake with carbon filter removed. Here's a video of it. I'm wondering if this is potentially a small leak either at chargepipe or the intake side? I checked both areas and they're tight and airbox is clipped on correctly.

No CEL either. Should I rev and monitor A/F, and if so, what's the ratio if there's a leak and how should I test (how much to rev car, etc)?

https://youtube.com/shorts/YFsOUEMtUfc?feature=share

[Danlnyc88]

did you make sure the O-ring in the chargepipes are seated correctly

[boba7523]

Originally Posted by Danlnyc88

did you make sure the O-ring in the chargepipes are seated correctly

Took it apart and O ring on both charge pipes are seated correctly. Intake hose and charge pipe clamps are tight also...

Does your car make those whiney sound like mine in the vids? Maybe I'm just overly sensitive since I usually drive with both exhaust flaps open (have Remus race). When I noticed that sound, it was with one flap off so it was noticeably quieter in the cabin.....