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Funny noise


pencilneck0
10-10-2008, 08:09 PM
I just purchased a 1999 s/w and Love it. Can someone tell me what that noise is when i first start it up it sounds like a pump or something running for about 40 seconds or so and then it shuts off?

RC1488
10-13-2008, 03:14 PM
Fuel pump pressurizing the fuel rail. If you dont hear it...then you worry :)

bmfzo6
10-21-2008, 09:00 PM
It is the AIR pump. look under the hood and it should be by the a/c compressor. The AIR pump is used to reduce emissions on start up

Airjer_
10-21-2008, 11:29 PM
I'll second the air pump!

RC1488
10-21-2008, 11:45 PM
No all of the '99 model year have the air pump. There is a '99a and a '99 b. But thinking about it more, it definitely could be the air pump.

For your information the air pump is used to help heat the front o2 sensor up faster :)

Scrapper
10-21-2008, 11:57 PM
i''l say it's fuel pump also. does it sound like zing then stops?

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