whistling noise

Mine does the same thing right around 2k-2500k, i found out that it was my Manual boost controller(*MBC*).

Blow off valve? It seems too obvious, but I have to ask.

Ryan

maui6651 said:

Blow off valve? It seems too obvious, but I have to ask.

Ryan

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Im with him or did i also miss something?

its all the power of the DSM

i would also have to agree, i think its the BOV, mine was doing the same thing, but i guess your going to have to check under the hood , have somebody step the gas and then let of the gas and im almost pretty sure youll hear it comming from the BOV.

C'mon guys im not retarted, its not the bov, the bov sounds when the boost builds up, i have a 1g bov and they dont whistle, they "whoosh", this sound comes even when i tap the gas and im not boosting...again it sounds likes breaks squeaking, but much lighter

check your belts man. they maybe glazed over and make a very horrible noise

if its a stock crushed bov it can make that noise it means you are getting a boost leak, get another bov a switch it and see if it makes it

Sleepintsi, I think I'm having a similar problem as yours.

When I pull into the parking garage in my apartment complex, I can CLEARLY hear it. I'll lightly step on the gas to 1200 - 1500 RPM and let off the gas. As the tach comes down, around 1000k or so, there is a loud "HEEEE-HONK" in high pitch. Most of the times, it's HEEE-HONK with variations of length on either the HEE part or the HONK part.

Have you fixed your problem? <:0)

EDIT:
Forgot to mention that this HEEE-HONK started after I installed the RRE UCIP and 1G BOV.

I say w/95% certainty its your 1G BOV!

Yes, that's what I found as well. I replaced the 1G with a HKS SSQV with recirculation kit, and the whistle went away! YAY!

...then another problem. I've done some research, and I found that HKS SSQV flutters... whistling is gone, but not it flutters. (sigh).

SO I've gone back to the 1G BOV. Anybody want HKS SSQV BOV flanged for 1G?

How many miles on your car?
It's the "injector o-ring" which gotten hard over time and air is leaking. Sounds like BOV, but you ruled that out(duh!). It's the o-rings that sits on the int mani hole. You can imagine it gets heat-cycled a lot. I'd say if you got more than 100k miles, it's time.

Sleepingtsi95 said:

ok guys, check this out when im driving and i let off the gas, there is a slight whistle that goes for about one sec, i thought it was just me but i had alot of friends tell me they heard it. -the noise almost sounds like bad breaks but waaaay softer. its obviuosly not the brakes, and i thought it was the clutch but its definately making the noise when i let off the gas....what is this NOISE!! i it good, bad or does it matter at all?????- sorry its driving me crazy

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Yunebug said:

Yes, that's what I found as well. I replaced the 1G with a HKS SSQV with recirculation kit, and the whistle went away! YAY!

...then another problem. I've done some research, and I found that HKS SSQV flutters... whistling is gone, but not it flutters. (sigh).

SO I've gone back to the 1G BOV. Anybody want HKS SSQV BOV flanged for 1G?

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sure i will take it how much???

btw that flutter is normal for the hks ssqv.

and on the 1g valve yep that is where your whistle is coming from.

Yes, I've also heard that the fluttering is normal. I just can't stand the noise. I almost think the whistle is better than the flutter... <:0)

The BOV must be quite old.. it IS from a 1G, so. :0)

RSR93, I can give it to you $205 shipped. HKS SSQV and the Recirculation fitting. PM me for details.

Good info on the injector orings... A good way to test for this (and other leaks) is by shooting the areas of suspision with starting fluid - your idle will bump up a lil if there is a leak.

Starting fluid is another good info, too. I'll shoot on TPS as I'm sure to see it's leaking. About 200k miles on my 'beloved' Talon(original owner). Ahh, I'm pondering on 50trim, 57trim, or evo3 16g....evo turbo can work with stock smic but 50+trims require fmic, and a whole nine bits.
"To 50trim or evo3 turbo, that is the question"(Shakespere in 21st century).

thescamp said:

Good info on the injector orings... A good way to test for this (and other leaks) is by shooting the areas of suspision with starting fluid - your idle will bump up a lil if there is a leak.

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it is the bov. mine does the same. its just leaking a little.

Kinda. It is not really the bov itself but a resonance when you switch to metal aftermarket pipes. I have read a few threads on this board over the years on this noise. Alot of people report it with the 1G bov for some reason. More so than with other aftermarket bovs.

so that whistle you hear if your driving and the boost isnt kicking in is a boost leak? cause i hear that too if im driving around i'll hear a constant whistle sound comming from my BOV...does that mean i have boost leak aswell? i have a 95 talon...should i get a new BOV?