Developed high pitched Whistle noise

[ollieh17]

My PFL has developed a really annoying whistle noise. It started off quiet getting louder as revs/speed increased, however its quite loud now and sounds like a supercharger. Unfortunately it isnt charged, but the noise gets louder as revs increase.

 

[bxlheathsupra]

Does it do it on idle? Can you work out where its coming from roughly??

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[ollieh17]

Nope doesn't do it on idle. Can only hear it while driving in the car. Considered wind noise from somewhere but seems to be me rev related than speed. Have a AEM V2 induction

 

[ollieh17]

Done some more googling and seems to be normal with a AEM V2, despite not hearing it before. Gonna whip the throttle body off and give it a clean

 

[carl hammond]

Done some more googling and seems to be normal with a AEM V2, despite not hearing it before. Gonna whip the throttle body off and give it a clean

I have an AEM long arm in the bumper and don't get anything whistle wise etc and I run an RM01A so it's deff not being drowned out by exhaust noise, do you have a Solid Fab exhaust? I have heard them have a weird whistle style noise on run off

 

[ollieh17]

Nope Custom exhaust. Mine isn't a long arm, its the one that sits above gearbox. Think ill give the filter and throttle body a clean

 

[carl hammond]

Nope Custom exhaust. Mine isn't a long arm, its the one that sits above gearbox. Think ill give the filter and throttle body a clean

Oh ok maybe the noise is more noticeable as it's so close to you and only needing to get through the bulkhead

 

[ollieh17]

Yeh it does sound like it comes from that side of the engine. But it definitely hasnt always done it. Got a track day at Combe on Sat and is really gonna bug me!!!

 

[carl hammond]

Yeh it does sound like it comes from that side of the engine. But it definitely hasnt always done it. Got a track day at Combe on Sat and is really gonna bug me!!!

Would the crash helmet not block it out? Very odd if it wasn't there, maybe a hose is loose or has developed a split or something to cause it? or the cone filter itself loosened off?

 

[ollieh17]

Would the crash helmet not block it out? Very odd if it wasn't there, maybe a hose is loose or has developed a split or something to cause it? or the cone filter itself loosened off?

Its pretty loud but might do. Haven't left much time to check it out. Only booked the track yesterday, with clocks going back hard to find the time

 

[carl hammond]

Its pretty loud but might do. Haven't left much time to check it out. Only booked the track yesterday, with clocks going back hard to find the time

Yeah I know that feeling, it's a pain as dark when both leaving and returning home from work now

I have not done Combe yet, its on the cars for next season though

 

[bxlheathsupra]

I have an AEM long arm in the bumper and don't get anything whistle wise etc and I run an RM01A so it's deff not being drowned out by exhaust noise, do you have a Solid Fab exhaust? I have heard them have a weird whistle style noise on run off

The solid fab does have a weird noise when let off at high revs but not a continuous noise.... maybe you have a secret super charger installed haha

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[ollieh17]

The solid fab does have a weird noise when let off at high revs but not a continuous noise.... maybe you have a secret super charger installed haha

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It was previously charged !

 

[carl hammond]

It was previously charged !

You have half a charger setup still hidden there

 

[Pboll99]

Hi, does you inlet and throttle body have a space adapter plate between it? As I‘ve had a similar noise like yours where my spacer plate has rattled loose! Mine too happened just after a track day.


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[ollieh17]

No don't think it does!

 

[carlos7777777]

Just a thought but could it be interference coming through the speakers with the signal and power cables from your head unit being too close together?


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[Grano]

Alternator ok? Mine did that for about a month before the charge light came on. If one diode goes it whines in relation to rpm. Sounds a bit like a badly earthed head unit does.

 

[ollieh17]

sorted it before the track day. Took the induction kit off and put it back on and was gone. Assuming loose hose clip somewhere