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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 01-09-2004, 02:58 AM   #1 (permalink)
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Hi guys!!

I have idle problems with my 525i M20 engine.
While checking for vacuum leakage I noticed that the engine sucks air thru a small onep ended hose mounted on the brake booster's check valve (vacuum line).
I am wondering if this is normal since the air is not measured by the AFM.

Thanks!
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Old 01-09-2004, 11:22 AM   #2 (permalink)
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that line fell off of something ive never seen a booster suck air from a hose of anysort unless it was directly hooked up to a solenoid or valve.. get a drop light and have a look around the area of that hose it most likley fell off its fitting and the air the lack of opening and closing that particular part has cuased your idle to go to crap....
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you know your not paying attention when this happens:

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Old 01-12-2004, 01:07 AM   #3 (permalink)
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Thanks! I found that the thin vacuum hose that goes inside was disconnected. I reconnected it but this morning I still had a hunting idle when cold for 2 min.
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Old 01-12-2004, 12:08 PM   #4 (permalink)
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check the area around the hose for leaks. being exposed to the elements may have caused it to stiffin up at the neck and continue leaking.
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you know your not paying attention when this happens:

<div class='quotetop'>QUOTE</div><div class='quotemain'>Are you refering to his Signature? oh shit, i just remembered i used my name in my sig... I just 0wn3ed myself. </div>
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