nathantheman

i have searched and searched but no luck. everytime my car goes above 2 psi on my autometer gauge, my car makes this noise similar to a belt squeeling, i have checked the belts and tension and after some tests, ruled them out. it will do this as long as i am boosting and some people tell me it is a boost leak. i have tried to locate and fix the leak but none of the hoses or connections after the turbo seem to have anything wrong with them i have tightened and retightened all the joints around the intercooler. still it makes this noise with is only getting worse. my car really feels it too like its leaking boost somewhere cause its not so fast any more. you can still boost a little and the turbo spools like normal but at a certain point the car starts to squeel. back off on the gas pedal a bit and it goes away. i can hear the turbo whine and it sounds normal. this is not speed or rpm or gear realative. only boost realative.
any one with experience about boost leaks give me some pionters about where to look and what it could be. thanks

nathantheman

i also have a manifold exhaust leak, i don't know if this would be related but thanks for any help

nathantheman

bump cmon somebody must have had a boost leak, and can share what they did to fix it with me

Turblown

iTrader: (12)

Well what kind of Boost #s are you seeing? and what are you mods? Have you checked shaft play?

nathantheman

i made eight psi with 2.5 in straight pipes and an intake cone filter i was hopeing for like ten fcd of course

89t295k

I'm makin 6....with 2.5 and high flow cat....like to know how to make more too...

Warehouse

Maybe check the housings...

89t295k

Check housings???

Ryde _Or_Die

Yes it could very well be related.

89t295k

How would u check or know??

Ryde _Or_Die

How do you check the housings? I guess hes talking about compressor/turbine housings. Pull the turbo and see how they look.

For how to make more boost, get a new catback and a custom TID and cone filter. You will need a FCD and possibly to port the wastegate if you see too much boost then. Try just the intake first, its cheapest and should get you to around 8psi or so.

89t295k

TID??? Turbo Inlet Duct?? Where can I get one?
Also, boost skyrockets to 6-7psi and stops dead at that level like something is telling it to stop??? any thoughts.

new12Aengine owner

that would be the wastegate doing it's job.

Ryde _Or_Die

Ok, so you have a full exhaust with a high flow cat, and an intake and only see 6psi? What kind of gauge is this on? Have you tried the cheap manual boost controller? Maybe a boost leak? When you get to 6-7psi, does it hesitate fairly badly?

89t295k

No hesitation...maybe it's my two 2'' magna flows???

nathantheman

so you think the exhaust manifold leak would affect psi? would this hurt spool up too?