Hai

I start my car today morning , I heard a noice from the timing belt and throttle body hose area , after the rpm goes down the sound is gone with a air realising sound , then the car is in perfect condition no sound and nothing

Please let me know what's that sound coming while starting in cold start and how it's going after the rpm goes down

It's usually a leaking SAI pump housing.

http://uk-mkivs.net/topic/9315-step-by-step-guide-for-repairing-the-secondary-air-pump-with-pictures/

Yup, if it clears when the revs drop it's pretty much guaranteed SAI. Not really an issue until it gets really loud so might be worth just ignoring it for now and then look to sort it out or remove it. Most people get rid and have it mapped out as it's usually a lot cheaper and its only there to help with emissions for the first 90 seconds or so after the car is started.

 

That and the noisy starter motor are pretty common when the temperature drops

Can I drive the car ? Will this make any power loss or any other damage ?

Yup, if it clears when the revs drop it's pretty much guaranteed SAI. Not really an issue until it gets really loud so might be worth just ignoring it for now and then look to sort it out or remove it. Most people get rid and have it mapped out as it's usually a lot cheaper and its only there to help with emissions for the first 90 seconds or so after the car is started.

That and the noisy starter motor are pretty common when the temperature drops

No it won't cause any damage, but may throw a fault code at some point.

No it won't cause any damage, but may throw a fault code at some point.

im also getting a sound while driving after 3000 rpm 

sounds like a turbo whistle 

is that the sound of the sai pump ?? 

im also getting a sound while driving after 3000 rpm 

sounds like a turbo whistle 

is that the sound of the sai pump ?? 

 

 

No the SAI turns off after about 60 secs.

Edited 12 January, 201511 yr by pauldazzle