got a loud screaming noise from bonnet

[mikey4410]

hey guys, whatever this problem is its affecting my fueling a bit.

i have developed a screaming noise when coming on boost on my ct9 (same as noise as when u pinch the neck of a balloon on both sides and let it down) and i have no idea of were its coming from at all.

my fueling has gone lean because of this im pretty sure ,so i am thinking its a boost leak tbh.

i am really stumped on were to go from here as all my brand new boost pipes are tight and i just dont know what to do.

Edited August 10, 2013 by mikey4410

[1990timeismoney]

Could it be a injector

[mikey4410]

I have also swapped back to standard fuel reg to makesure its not the new sard and its not for sure.still does it with standard.

[AdamB]

Cracked exhaust manifold mate. They tend to make a squeeling noise.

[bucketep91]

Or a cracked head?

[Mad Mike EP82]

Fuel pressure regulator leak

[mikey4410]

Found out its the boost controller.turned it down a smidge and noise stopped.very weird..thanks for yall help.

[mikey4410]

Found out its the boost controller.turned it down a smidge and noise stopped.very weird..thanks for yall help.

[iamlegend]

Have you checked to see if you have a stuck child in the bay some where?

[mikey4410]

Haha.i will have a butch

[MARC MOSS]

yea that or a cat

[ryan lang]

Was expecting this

[richdog]

Sound like next doors cat that falls asleep under the bonnet.

[Sefton-EP91]

I know you said you have sorted it. You may want to just check the bolts that hold turbo to manifold. I had this same issue with mine. Tighten up and now its all good

[Ep'd]

Had this on my Subaru sti on high boost. You know what the noise disappeared on low boost but reappeared on high boost!

It was the top mount sti Intercooler had popped and it was screaming like how you explained!