C4 VTS 180 - Secondary air pump noisy on engine start

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lancia58
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Joined: 30 Nov 2010, 08:02
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C4 VTS 180 - Secondary air pump noisy on engine start

Post by lancia58 »

Hi

When starting the engine in the morning the secondary air pump is very noisy I guess it turn in very high speed. After two to three minutes the noise disappears. I know on cold start the secondary air pump streams air to the catalytic converter to help it reach working temperature but I wonder if the noisy pump is normal ?

Thanks

wheeler
Posts: 4040
Joined: 21 Sep 2002, 19:07
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Re: C4 VTS 180 - Secondary air pump noisy on engine start

Post by wheeler »

They are usually very noticeable when they are running.

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Clogzz
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Re: C4 VTS 180 - Secondary air pump noisy on engine start

Post by Clogzz »