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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 04-23-2011, 11:54 AM   #1 (permalink)
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94 530i Rough Idle

Hey all, my 530i has a very rough idle that started a couple of weeks ago. I had a CEL that said it was my O2 sensors. I changed out both, the CEL went off but my rough idle continues. When I step on the gas pedal, I have limited power until it shifts into 3rd gear. I'm told I need to check my ICV, I just don't know where it's located?? Any other suggestions on what may be causing this would be greatly appreciated.

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Old 04-23-2011, 06:01 PM   #2 (permalink)
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Check your intake manifold and ducting for vacuum leaks. It could also be the Air Mass Sensor on its way out, sometimes you can clean the sensor element with brake cleaning spray.

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Old 04-30-2011, 08:14 PM   #3 (permalink)
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ICV may be fitted into a hose off your MAF boot!
Check item #9 in this link to realoem

RealOEM.com BMW E34 530i Mass air flow sensor
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Old 05-01-2011, 08:38 AM   #4 (permalink)
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The Idle Control Valve should be near the throttle body or top breather hose...
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