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Odd sound just after start-up

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Old Nov 3, 2009 | 11:32 PM
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Default Odd sound just after start-up
Okay, it just started a few weeks ago. After cold start-up, I hear a whiring sound like a small vacuum cleaner just behind the firewall. I stops after about 2 mins.

Everything is running normal.

What could it be?
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Old Nov 3, 2009 | 11:52 PM
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I get that too...I figured it was an electric fan. It has happened since I purchased a month ago and it went through a PPI and passed with flying colors. I have had other German cars and they had electric fans so I thought it was similar. Sorry I don't have a more technical answer. Basically, I'm not worried about it.
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Old Nov 3, 2009 | 11:57 PM
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Sounds like it could be the SAI Pump... Its really just a fan located under the intake, passenger side, up near the firewall.
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Old Nov 4, 2009 | 06:38 AM
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Ahhh...

Must be about to go if it's starting to make noise.
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Old Nov 4, 2009 | 07:15 AM
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Sounds like your SAI pump is operating normaly.
Do a search on SAI Valve Replacement, if you need a new project:-)
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Old Nov 4, 2009 | 08:23 AM
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Just get louder mufflers so you won't hear the noise!
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Old Nov 4, 2009 | 09:00 AM
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Originally Posted by CaptainGSR
Do a search on SAI System removal, if you need a new project:-)
Fixed that for you.





Andreas
Last edited by AOW162435; Nov 4, 2009 at 10:56 AM.
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Old Nov 4, 2009 | 09:12 AM
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on a 95 a noisier-than-normal SAI pump (at startup, of course) can also be clogged SAI ports.
OBDII cars won't throw a code. The air has nowhere to go.

See AOW's post above
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Old Nov 4, 2009 | 09:31 AM
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Funny mine doesn't make that noise.....
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Old Nov 4, 2009 | 09:53 AM
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Remove the SAI system on the 95 models (only 95 OBD I). Worthless. Glad it's gone and sitting in a box in the basement. Engine out takes 6 minutes to remove, engine in is about 6 hours. Andreas can elaborate further on removal times. I did mine while the engine was out it also gives you a chance to tinker with other bits and do some cleaning.

Mike
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Old Nov 4, 2009 | 10:50 AM
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Originally Posted by Cactus
Funny mines don't make that noise.....
Gee, I wonder why?





Andreas
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Old Nov 4, 2009 | 02:31 PM
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Andreas, what did you plug up the connection to the airbox with?
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Old Nov 4, 2009 | 04:40 PM
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Originally Posted by ReinerFink
Andreas, what did you plug up the connection to the airbox with?
I removed the hose leading to the rear of the airbox, and installed a Yakima load bar end cap with a small amount of Goop. Perfect fit, and completely stealth.


Andreas
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Old Nov 4, 2009 | 05:23 PM
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Originally Posted by AOW162435
I removed the hose leading to the rear of the airbox, and installed a Yakima load bar end cap with a small amount of Goop. Perfect fit, and completely stealth.


Andreas
Professional!
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Old Nov 4, 2009 | 09:14 PM
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I removed the hose leading to the rear of the airbox, and installed a Yakima load bar end cap with a small amount of Goop. Perfect fit, and completely stealth
.

Nice!!
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