New exhaust sound. - 6SpeedOnline - Porsche Forum and Luxury Car Resource

Oct 13, 2007 | 01:55 PM

Vincy

Thread Starter

Registered User

Joined: Jul 2006

Posts: 134

From: Maryland

Rep Power: 25

New exhaust sound.

I have a question. There is a new sound with the TT. When it starts it sounds like an exhaust leak or passing gas or a missing cylinder. At the same time the engine is surging at idle. It seems to go away as it gets warm. I had the car at the track yesterday, it ran well and was fine on the way home. It has a Giac tune and a Fabsped quiet exhaust, and right now has some 100 octane unleaded race gas in the tank as well as 93 octane. Please not this is Not a criticism of Fabspeed, I'm just looking for ideas to check. Thanks.

Oct 13, 2007 | 04:18 PM

TT Gasman

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Joined: Jul 2003

Posts: 1,989

From: Texas

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Check all the clamps, make sure there is not a leak.

Oct 13, 2007 | 07:39 PM

steve harris

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Joined: Nov 2005

Posts: 3,658

From: rocklin ca

Rep Power: 261

hope i'm wrong but a cracked piston can sound like an exhaust... at least in a 56 ford...seems like the leak goes away when the car get warm ??? i would guess expanson quites the leak...