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Re: terrible boost leak. need help
Take you car for a Boost Leak test, i found a few Boost leaks i didnt even know i had....
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Re: terrible boost leak. need help
+1 Checking for rips/cracks isn't good enough. You need to pressurize the system from the turbo on. Build one of these and use it often.
http://vfaq.com/mods/ICtester.html The other thing I can think of is the wastegate flapper sticking. I know its hard to see since you have the arm and actuator on the back side. There is a sleeve around where the flapper arm enters the hotside. I've had the sleeve work its way out part way. It causes the flapper to move with it, and uncover the wastegate port seading to a large internal exhaust leak that you can't hear. Very slow spool, and much lower boost than normal. It can move far enough to make the WG stick open or closed also. If you can get a mirror back there, see if that sleeve is close to flush with the hotside or not. It should be close. Good luck. |
Re: terrible boost leak. need help
Originally Posted by aero
+1 Checking for rips/cracks isn't good enough. You need to pressurize the system from the turbo on. Build one of these and use it often.
http://vfaq.com/mods/ICtester.html The other thing I can think of is the wastegate flapper sticking. I know its hard to see since you have the arm and actuator on the back side. There is a sleeve around where the flapper arm enters the hotside. I've had the sleeve work its way out part way. It causes the flapper to move with it, and uncover the wastegate port seading to a large internal exhaust leak that you can't hear. Very slow spool, and much lower boost than normal. It can move far enough to make the WG stick open or closed also. If you can get a mirror back there, see if that sleeve is close to flush with the hotside or not. It should be close. Good luck. |
Re: terrible boost leak. need help
awesome, thanks for all your help guys. i'll check the wastegate hopefully this weekend!
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