Audi TT 2002 225 HP 6 speed..

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Old 06-18-2015, 05:35 PM
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Default Audi TT 2002 225 HP 6 speed..

Hi i just purchased last april a 2002 audi tt ALMS 225 hp with a 6 speed manual trans.
I just have a few quick questions...
1) After i use the car i hear a buzzing sound coming from the engine for about 10 minutes but sometimes just after using the car i dont hear that sound,.. is it normal to hear that sound??? many posts aboout the turbo cooler and stuff like that, but sometimes after i use the car that thing that makes the noise is silent.... is it all normal???/....

Thanks for your help
Old 06-24-2015, 11:45 AM
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Its the air injection pump running. Its an emission pump that pumps air into the exhaust to warm up the converters.
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