I was autocrossing my car yesterday and after several run i noticed that suddenly I was really lacking power when I should have been deep in boost. Initially I had a warning light but between run that went cleaned itself. Driving home on the interstate what I notice was that when I got above 10 lbs I could hear a loud sound like an air compressor spraying air under the car. I would still build boost a bit but certainly much well less than normal. It sounds like some type of a leak - perhaps a hose clamp is leaking or something like that. Any ideas what the likely culprit might be? Any tips on troubleshooting?

 

Are you still running the stock intake? If so, check to make the snorkel is secured to the radiator support.

 

No K&N Intake

 

u have a leak somewhere. i had my car worked on at mits and the didnt put my intake back together right and they had the hose clamp no on right and it did exactly that. check all the hoses and clamps and make sure they are on straight

 

Get under the car and check the intercooler's connector hoses and hoseclamps.

 

ya... if it sounds like the air is comming out from under the car... i would check the lower IC pipe... both connections... it might have slipped off the turbo or the IC..