Question about 2000 BMW 3 Series

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Bmw air pump

I have a 2000 bmw328i and when I first turn it on in the morning... it has a loud screeching sound on the outside, and in the inside it has a suction sound. But then after about 2min the sound goes away and the car drive fine.... there are no check lights on. when I apply pressure on the secondary air pump the frequency (high pitch noise) changes.... I also have a small exhaust leak... does anyone know if this could be the where the noise is coming from if so... is it hard to fix...or could I just bypass it....

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That is the egr valve, the car needs it in order to start efficiently. u do not need to worry about this it is normal on bmw, it depends on the climate

Posted on Feb 18, 2009

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SOURCE: bmw air injection pump problem...HELP!

sounds like the secondary air pump has water contamination. If you unplug the connector for the air pump, and check it on cold start, did the noise go away? If the pump is bad, you need to replace the secondary air valve. Sounds like maybe it is contaminated and not seating fully.

Posted on Mar 09, 2009

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Posted on Jan 02, 2017

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