ibkevin

On the off chance that someone has experienced this..

At ~.5 boost I start to hear a howlling like a distant wolf on what seems to be the drivers side, and my max boost tops at 1. I have paid extra particular attention about charging air connections. Does this sound like an ISV body leak?

BOV is good an tight, it's on the charged side so the propane test is no good (maybe good at idle under vac).

Ian Carr

i know my car makes a siren noise specially if i tap the gas a little then let off. if it sounds the same im pretty sure its just the turbo wine

-Ian

MPD47

You've got a cone filter, you will hear increased noises from the turbo. Sounds normal to me.

black944 turbo

agreed with a maf that sounds normal. I know mine did that with the maf and now back stock it is quiet.

sweanders

Check to see that the intercooler connections are on tight, if not they will leak under boost.

turbo8

are you saying your boost gauge only reads to 1 on the stock gauge? if so you have a big boost leak

ibkevin

^^^^ Good eye! I posted the boost press because I know what a turbo/wg sounds like through a maf.

The leak is not that big and all the visible stuff is TIGHT, that's why I'm thinking under the intake. CV is gone but ISV is still there.

Sounds like it's time to mooch some compressor time to press up the intake.

turbo8

bypass the isv to see if that helps

ibkevin

Since the car is operated mainly in Socal, I think I'll just pull it.

ibkevin

*UPDATE* Mechanically eliminating the ISV does not solve the problem and the car refuses to idle without it!

Ebby_951S

I get that same kind of howling sound, but only at around 1.5k rpm in first or second gear, and only after the car has fully warmed up. to make it go away i need to either let off the gas, or give it some more.

needless to say, it's a pain during rush hour traffic. could it be the same thing? heads definitely turn in my direction if they have their windows rolled down, but it's not the kind of attention i'd like...