Car acceleration whistle, any technician out there?

[paulnur]

When I accelerate at about 50% on the pedal (trying to find the sweet spot) I can get my car to whistle? I recently had my car go into the shop because my "turbo inlet vale" (I have to check the receipt) or something of that nature was malfunctioning witch made my car whistle like there was a tea kettle under my hood just idling (this was completely random when it happened). Any idea's on the whistling during acceleration?

Also, another thing, before I had my car in the shop after I installed my cold air intake when I rev'd my car and let off (around 4-5 grand) it made well I cant really describe it like it was the turbo, TURBO BARK? I searched around and saw youtube videos and it sounds the same (different car's and different variations of the noise but same thing). After the shop it stopped making that noise and now it sounds EXACTLY like a blow off valve.....IDK....

 

[drtechy]

What is this sweet spot? Sweet spot is wot if you ask me

 

[paulnur]

What is this sweet spot? Sweet spot is wot if you ask me

Like when I accelerate up to 50% of the throttle I keep going up or down on the throttle and that's when it whistle's

 

[drtechy]

That's just your wastegate most likely, and the other sound is your diverter valve most likely, it gets a lot louder once you put an intake on

 

[paulnur]

That's just your wastegate most likely, and the other sound is your diverter valve most likely, it gets a lot louder once you put an intake on

I have an intake, and here I refined the problem. It's when I accelerate and just start to let off like im catching the pressure coming out at a certain pressure and I can make it whistle. That's normal?

 

[drtechy]

I have an intake, and here I refined the problem. It's when I accelerate and just start to let off like im catching the pressure coming out at a certain pressure and I can make it whistle. That's normal?

Sounds like your wastegate to me, I can find the right spot to get it to do that too.

 

[paulnur]

Sounds like your wastegate to me, I can find the right spot to get it to do that too.

Can or can't?

 

[drtechy]

Can or can't?

can.

Shoot a video of it if you can and upload it, then we'll be able to tell you for sure.

 

[paulnur]

can.

Shoot a video of it if you can and upload it, then we'll be able to tell you for sure.

Perfect idea, ill have it by the end of the night.

 

[drtechy]

Perfect idea, ill have it by the end of the night.

cool, yea should be no problem as long as we can hear it.

 

[zmoclov21]

Super old post, I understand, but did you ever get a final diagnosis of this?

 

[snobrdrdan]

Some of the intakes out there can/will "whistle"

 

[kruegernaut]

VWR intake gave me a whistle on acceleration (harmonic issue). Some threads out there suggest DV relocation to solve. It was worse in the warmer weather. I switched to the EVOMS intake and it went away, along with fuel trim issues.

Early in the cars life (34k miles, pre mods) I also had a chirp/whistle on acceleration. It ended up being the timing belt tensioner. At that time, the dealer replaced it under warranty, and the issue was resolved.

 

[michail77]

Super old post, I understand, but did you ever get a final diagnosis of this?

It all sounded normal. Many intakes like the p-flow will bark from the DV and sing with harmonics as RPMs increase. I also get a whistle coming off throttle or maintaining slight throttle at 10 in Hg vacuum. I hate hitting that spot as it sounds like a deflating balloon.

 

[zmoclov21]

Yeah, mine never started until I replaced my old stock grommet style DV to a stock Rev D DV. It also made the "PHSssss" standard CIA sound much quieter once I changed the the Rev D. I've been running the P-Flo CIA forever - Well before the DV change, which is why I'm curious about the issue. To me is sound like some sort or crane screaming.. But it sounds like the DV is just barely at its release pressure and is just slightly starting to let air out, but that wouldn't make any sense because it happened when throttling...?