TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Cold Start sputtering

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Old May 3, 2007 | 10:58 AM
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Default Cold Start sputtering

My TT is getting sooo close to being in great shape (and ready for mods).

But it has this problem still, and I'm confused...

Some colder mornings (45* today) it turns over quick, but sputters before reaching a solid idle. Seems like it's starved for gas...

Recently I've changed my plugs, fuel filter, temp sensor, t-stat, checked for vacuum leaks, and cleaned the throttle body and MAF sensor...

Any ideas?? Search is turning up things I've tried already.

TIA!
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Old May 3, 2007 | 03:09 PM
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Maybe the cold start regulator valve is starting to fail...
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Old May 3, 2007 | 03:47 PM
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I thought that valve was a myth??
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