I was driving my car yesterday, and I stomped on the gas, it made a weird noise. and now when I get into it, it doesn't boost like it should.
It makes a shhhhh noise when it boosts. I can still hear the turbos boost, but it's weak as hell. I had my friend press the gas when I was under the hood, and it looks like the belt on the uper left pump stops when it gets to a certin RPM. I think it said on the hood that is is the turbo pump are A/c pump are something, please help me. It's not boosting like it use to.

 

im not sure about your belt, but when i loose boost like your describing, my intercooler pipe usually is dislodged. if you havnt already, try moving it and see if its loose.

chris

 

I checked all the intercooling hoses etc....all seem to be tight.....On the hood it looked like the turbo charger #4 on the hood diagram (the upper left most compressor stops when you reach a certain RPM) Is this supposed to happen?

 

"Whoosh" and low boost? Probably your rubber coupler on the turbos. They split all the time and you cant tell if it's cracked until you remove and inspect it.

 

You are looking at the airpump. It is for emissions and cuts off at full throttle and 3000 rpm. I agree with them, take off the coupler coming off the y-pipe and check for splits.

 

sounds like that could be it, I'll check it out. thank's.

What if it is cracked? what do I need to get to repair it?

 

I forgot to tell ya it's an auto, if that helps any

 

Get a new one from a dealer or go all out and get the efini y-pipe.

 

with this cracked plastic piece coming off the y-pipe: would it still be possible to have a full 10-11 psi on first turbo then the socnd one be at like 9psi with a dip to 5 psi on the transition?

 

No. If you aren't transitioning well it's more likely to do with the precontrol solenoid/actuator/hoses.