SilvrLT

I had My Cobalt in at the dealer th other day for service b/c the car was making a loude whisle under heavy acceleration. I thouth maby my compresor clutch was stick or somthing. The dealer told me nothig was wrong and this was normal for the 2.2. Has anyone else had this problem??

Sw4y1313

Yes my car used to whistle under hard acceleration at around 5k rpms or so. Now it just makes this loud spooling sound. I may need to take it in....

SC cobaltss15

lol... i love it +1 rep ahah

umrdyldo

iTrader: (1)

I hope everyone has this sound. I actually love it. It became more prenounced after my intake upgrades too.

SilvrLT

So I guss this is normal afterall.

07cobaltss

catalytic converter is my best guess. that whistle noise happens when it gets clogged. my guess is somewhere down the road you'll get an CEL. does this happen like as soon as you hit the throttle and go into high RPMS, and just AT high rpms?

409Cobalt07

my car makes a sound like that after i got my cai installed. and once i put on the 2.4L intake manifold it does it even more now...

umrdyldo

iTrader: (1)

It's not CAT unless mine was clogged from the factory. Mine was much more noticed after K&N filter was installed. Not really sure what it is. It's not a bad thing.

originaladrian

ya after i put the injen CAI on i get this whistle at like 2500RPM but only there, idk its kinda cool i guess lol

07cobaltss

i don't think I've ever herd a naturally aspirated engine "whistle" before. i just know thats a common problem with the 2.0's, cats clogging.

Sw4y1313

lol. The whistle sound from the intake is normal on our cars. But what i was joking about is that the turbo spool is so loud i cant hear the whistle anymore. Thanks for the input tho

novascotiag5

I had a whistle sound i thought it was the brakes at first but after really listning it was air on the door mirrors. Theres a gap in them and when its windy and i get going a certain speed it makes a whistl noise. dont know if this is what you hear though.lol

Belto

thats no problem man,, its just a super secret supercharger the 2.2 has..

Rangersltw

When i race my friends they all ask me if my car is turbo charged. Mine whistles around 3.5k and up. I think it sounds sweet, as do all my friends.

HatedCobalt

mine does it to.

pdub

Mine whistles under normal acceleration at all speeds around 1500 - 3200 RPM, very annoying.

cobalt07ls

hey guys that whistle you hear in the muffler with a moister hole in the bottom thats what make the whistleing noise i had it and it sounded bad ass then i got cat backs and it went away its just the stock muffler making noise

Sw4y1313

I didnt have a muffler on and it still did it. I had an CAI which also increased the sound. I had even raced my buddy before i was turbo'ed and he said from outside it sounded almost like a turbo it was so loud. I think its just a sweet noise our engines make N/A while under acceleration.

SilvrLT

It's deffinalily not the muffler the sound is distinctly coming from the passenger side of the engine

cobalt07ls

see i put borla exhaust on my car after i had straight pipes and once i took the muffler off i heard no whistle noises after that i dont know whats up woth that maybe somethins fucked up on my car because i dont hear that noise any more its wierd

its the stock muffler that made the noise i think and just a question whats a cai ive heard it but notpossitive what it is

ok got it i think i know what the noise is our ecotecs the L61's and lts have that EGC vaulve and i think thats what it is i hear it on mine now and i have intake on my car also and it is very noisy and cool sounden but our motors are like the i-vtech motors in the hondas but american made so its the tec part spoolin out i think haha

avenger09123

Mine whistles too, I modified the stock airbox, put on a 60 degree joint and then put on my spectre down in the wheel well, whistles too, sounds more like a ricer now though, miss my short-ram sound but I still get to wave at all the people I dust

SpeedJunkies07LS

yeah like i said i think its the EGC valve and our engines are set up to run like the v tech motors in hondas and all that i am pretty sure thats what that noise is from

by the way my old profile name was cobalt07ls haha

Spanky's Monkey

iTrader: (6)

oddly enough i get this weird sound similar to a bov. only happens during gear shifts and it's pretty bad as. it's even cooler with the bottle cause you'd swear i had a turbo if you didn't know.

C_Hardy

yes, it is because the 2.2 is DOHC and is considered an interference motor, and DOHC's make that "whistle" sound...just like the v-tec

NJHK

You're hearing air...