High Pitch Squeel

[ClutchBurndout-:(]

hai all,

since i can remember this has been happening, i think this noise is coming from the ecu, i have a stock ecu and at a sertain throttle this realy high pitch beep comes on, its not loud and its not that annoying but its there and worries me that its a warning beep, the noise disapears once i either put more throttle on or less, but at that sertain level it will beep untill you change throttle. i think it does it in any gear i havnt realy taken notes to it alot. has anyone had a similar issue?

cheers

please note, I THINK its coming from the ecu, it may very well be coming from elsewere, its one of those noises where you turn your head and the noise disapears lol

[Moodles2]

Could it be coming from the passenger door speaker? it could be "alternator whine" being absorbed your sound system: http://www.termpro.com/articles/noise.html

[mad082]

i used to get a slight alternator whine from the stereo when it was turned right down but not off. sounded like an electrical whine and got louder with rpm not speed. was only just noticable

[ClutchBurndout-:(]

yea this sounds like that, only it dosent increase with rpm, it is on/off with a sertain throttle

[Wacky Dee]

I don't think ECUs make noise ... as has been suggested, check your stereo setup .. I had new speakers with a crossover box installed recently and noticed the same sort of whine, apparently it was picking up engine/alternator noise. They just moved the crossover box a bit and it went away.

[kasanoff]

I get the same sound that you describe as well every now and then. Mine tends to happen at a certain engine load - I may be travelling in 4th at approx 60kmh, depress the throttle slightly due to a slight incline in the road and i get the noise. If I hold the throttle there and keep the engine loaded at that point, I can hold the noise. If I release the throttle or depress it further, obviously the load on the engine changes and the sound disappears. Kinda sounds a bit like faint feedback from speakers if you hold a microphone too close - but my stereo is never turned on.

My thoughts were that it is some sort of engine noise, possibly intake/turbo...

[ClutchBurndout-:(]

I get the same sound that you describe as well every now and then. Mine tends to happen at a certain engine load - I may be travelling in 4th at approx 60kmh, depress the throttle slightly due to a slight incline in the road and i get the noise. If I hold the throttle there and keep the engine loaded at that point, I can hold the noise. If I release the throttle or depress it further, obviously the load on the engine changes and the sound disappears. Kinda sounds a bit like faint feedback from speakers if you hold a microphone too close - but my stereo is never turned on.

My thoughts were that it is some sort of engine noise, possibly intake/turbo...

yea sounds alot like mine, i thought it was a boost leak or somethin, my sterio steup is pretty sound, so will have to check elsewear

[Douse]

Do you have a Profec B?

[(B1) MR_fanny]

+1...could be warning beep from your EBC possibly?

[Douse]

Well there is that possiblity, but I have noticed that there is a really high pitch beeping type noise from the Greddy Profec B's.......

I have learnt to ignore it

[ClutchBurndout-:(]

well I don’t think so lol, I don’t have an ebc unless theres one hidden somewhere that the last owner didn’t mention, that would be sweet!

[ClutchBurndout-:(]

Well there is that possiblity, but I have noticed that there is a really high pitch beeping type noise from the Greddy Profec B's.......

I have learnt to ignore it

its not actualy a beep persae, it’s a constant eeeeeeeeeeeeeeeeeeeeeeeeee

[Douse]

Well yeah, hence i said 'beep type noise'

Do you have a EBC?

[ClutchBurndout-:(]

lol no not that I can see, but maybe the last owner hid it somewhere? Maybe to keep out of vision of the police? Ill have a look around under the dash n stuff to see

[Douse]

I would say that would be your best bet.

You can also see if there is a boost controlling solenoid near the turbo somewhere. If you have something like that then there is a fair chance that you have a electronic boost controller.

Something like this:

[datsfreak]

mine does this too.

Do you have a standard exhaust? Maybe its a exhaust heatshield vibrating at a certain pitch.

[SiR_RB]

mine does the exact same thing, even with the stereo off

like others hav said, if im in 4th or 5th gear at 60km/h or so and hold the throttle in one spot it will start, soon as i just increase or decrease the throttle abit it goes away, but then comes bak.... its realy weird

i dnt think its intake cos it does it in high gear, low speed and the boost needle is way down in negative land...

hmmmmmmmmmmm