I got the car back today and it was after hours so I couldnt chastise them proplerly. Official response"Engine is operating as designed. It is normal for boost to automatically drop when the engine hits redline." This is all total crap and the boost leak is very prominant. Nobody knows anything at the dealerships.

Peter

 

I am not sure if this will help you, but we recently went through a similiar episode with a TXEVO's car. In the higher RPM's you would hear this brief air rushing noise and the boost would start falling off. After many hours of trouble shooting it turned out to be the snorkel piece comming off of the air box. He had left out the retaining pins that held it down, no one obviously thought it was a big deal. In the higher RPM's it was getting sucked up into the hood blocking the air flow. He actually got tipped off on that from some one on this forum.

 

Wow. I think this may be correct. You have no idea how much of the man you are. I just replaced these because the dealer lost them while changing the air filter for the 14500 mile service!! Since replacing those it has not done it again, but I never thought it was those 2 clips untill reading your reply. Thanks again, have been through hell on this.

Peter

 

What pins are you talking about....the pins that hold the bottom to the top of the air box??

 

The two little plastic push pins that hold the air intake elbow piece that feeds into the stock air box. Apparently they are far more important than we all thought.
BTW that was Silver Surfer who sent you that tip using my computer, like so many on this board he is one helpful SOB .

 

yes, that was definatly the cause. I tested it throughly today. I also went to the dealer and *****ed them out like they have never seen before. The owner was there and it was perfect. Service aint what it used to be. They cost me 10 hours of diagnosis time. Thanks again.

Peter

 

I just yesterday had the exact same problem, and sure enough removing this duct to the airbox took care of the problem. Do you guys think leaving this duct out is a bad thing.

 

This is one awesome thread!!! Silver surfer you are the ****!! So glad you got that figured out. Your dealer sucks *** lose2! Anyway, evo2355, I am no expert, but why would you want to take out the cool air intake duct? The nice mitsu engineers put it there to suck cool air from the grille. I would put the pins back in and drive on.

 

Once again, thanks again evey one. This forumn has helped me out alot. I am an expirenced tech, I and the dealer both could not fix this and EvolutionM solved it all.

Peter