986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - short vacuum cleaner sound

DG Boxster · 01-07-2015, 08:34 PM

After a cold start, my 98 Boxster makes a vacuum cleaner sound for a few seconds. I think there is an electrically driven pump of some sort that comes on, and then goes off maybe 5 seconds later. I can see that the electrical load on the engine changes. This is only noticeable when the engine is cold.

I looked around in the Service Manual and see that there is a "Secondary Air Pump" that looks electrical. What is this for? Should I be worried about it?

01-07-2015, 08:34 PM	#1
DG Boxster Registered User Join Date: May 2014 Location: New Mexico Posts: 74	short vacuum cleaner sound - electric pump? After a cold start, my 98 Boxster makes a vacuum cleaner sound for a few seconds. I think there is an electrically driven pump of some sort that comes on, and then goes off maybe 5 seconds later. I can see that the electrical load on the engine changes. This is only noticeable when the engine is cold. I looked around in the Service Manual and see that there is a "Secondary Air Pump" that looks electrical. What is this for? Should I be worried about it?