Hello Guys!
I searched this problem on the form but i did not get anywhere because there are so many opinions but here we go, recently i have noticed a weird whining noise from the car(i believe from under rhe car) when im accelerating gradually from 1500 to 3k RPMS after that my exhaust noise takes over, i heard it in 1st, 2nd, 3rd, and 4th gear. It does not happen in neutral and its only when im in gear and accelerating, im not sure if it was caused by the speed bump that scraped the whole bottom of the car the other day but i just noticed the noise. Car has 77k miles and i only drive it aggressively when im on a drag strip with my friends. I also doubt it is an exhaust leak because i had it checked and it was perfect also if it was an exhaust leak it would happen when revving it in neutral. Any help would be appreciated! I really cant figure this one out and im worried.

i will include few videos that i recorded earlier today of the noise.
THANK YOU!

1st video

2nd video

 

Stock intake? Plenum spacer? Z-tube?

 

I have the Stillen intake with the Stillen Z tube, MD 5/16 copper plenum spacer, MREV2, Berk HFC, and about 2 weeks ago i got a tune using the uprev osiris.

 

I didn't hear any of it on the videos so maybe someone else can pick it up.

 

Its hard to hear on the video but i feel like its coming from under the car, does anyone know the reason for this??

 

Here is another video, anyone??

 

Yeah I can hear that "whine" in all 3 video's. It sounds like either power steering whine (check fluid levels) or possibly bearing whine from one of the drive belt pulleys (take off belt, spin everything by hand and check for bad bearings). If your belts are old you could TRY replacing them but...

Definitely get the vehicle on a lift and make sure nothing was seriously damaged, it's possible you lost part of the bottom engine compartment cover and sound is just echoing up off the road. It does sound very normal though in the videos, all motors have a little whine to them but if it used to sound differently (with all the mods) then I would still check everything out.

If you haven't had the exhaust system "smoke checked" then you don't know for sure that there are no exhaust leaks, it doesn't sound like you do though.

 

oh i see, would the powersteerinf make the noise all the time?? i plan to jack the rear of the car safely and put it in drive and listen carefully to check where the noise is coming from. I really Appreciate the feedback! I was worried no one would be able to give me any input on this.