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Registered
Join Date: Nov 2000
Location: Dallas
Posts: 3,593
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High pitched AFM whine
Ok guys...a bit of a panic here. Yesterday I removed the AFM on my '88 3.2 to get access to try and fix some oil leaks (no go on that) and then gave up and put everthing back. Now I get a very high pitched whine from the AFM except when I tap on the accelerator. Any ideas?
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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10-30-2006, 05:07 AM
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Registered
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Location: Dallas
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Bump to get the afternoon crowd. I'm wondering if I should risk driving it home....it seemed to be running exactly as before, just a loud whistle/whine when no load. The instant I touch the gas pedal it goes away until engine no longer under load.
TIA
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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10-30-2006, 12:13 PM
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heiliges blechle!
Join Date: Aug 2005
Location: Travel a lot
Posts: 425
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My '84 gets a high whine this time of year when the engine is cold. It is from the Ambient Air Valve. It goes away when I step on the gas a bit and then after the car is warmed up. In the summer you never hear it. Must be an air bleed somewhere otherwise.
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'84 M491 '07 Silverado '75 Suzuki GT550 2-stroke triple '02 Aprilia Mille R '07 Ducati S4Rs '08 Night Train Last edited by Bill in OKC; 10-30-2006 at 12:24 PM.. |
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10-30-2006, 12:22 PM
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Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Might want to pull your AFM again and see what hose you missed.
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10-30-2006, 12:47 PM
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Registered
Join Date: Nov 2000
Location: Dallas
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OK, I found one of the cloth vacuum lines that goes from the back of the throttle body over to the group of connections by the oil filter connection. Hopefully that's what was causing the whistle/whine. It seems like a likely solution.
Thanks for the help.
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Buck '88 Coupe, '87 Cab, '88 535i sold, '19 GLC 300 DD Warren Hall, gone but not forgotten |
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10-30-2006, 06:29 PM
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