Ok so I have a 03 Gsr and all of a sudden it won'take more then 13lbs of boost and is making a loud whistling noise.

I did a boost leak test from the intercooler inlet tube and it is leaking a little from the throttle body and one of the injectors... Do you guys think these leaks would make it lose 7lbs of boost?

I replaced the tb gasket and no change... I plan on doing the shaft seals and injector seals now but anyone have any other ideas?

Any help is apreciated... This things been driving me crazy for the last couple of weeks

 

We need much more information in order to help you, like what mods, etc.

 

Oh yea it's mostly stock... Uicp, licp, utec tuned with 21lbs boost, tbe, hks intake I think that's it... Also it doesn't make the noise unless the engine is under load

 

I was loosting about 4 psi of boost when my shaft seals were about half gone, so its possbile to loose 7 if they are really shi*ty.

 

Ok that's good to know...I just was thinking that it's slot of boost to be losing from the shaft seals but I'm deff going to replace them asap

 

yeah if the leak test shows they are leaking go ahead and replace