Rough Idling

2003 BMW 530I
100,000 MILES • 3.0L • 6 CYL • RWD • AUTOMATIC
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NORTHGABOY
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Car idles really rough. Have checked for vacuum leaks, but can't find any. I have also already cleaned the mass airflow sensor, but it still idles rough. Could it be the DISA valve (or intake manifold control valve) or idle control valve? If so, is there a way to check them? Can someone help me diagnose what is going on with it? Thanks.
Mar 9, 2016 at 7:21 AM
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WRENCHTECH
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You should have some codes in the computer. What are the numbers?
Mar 9, 2016 at 9:03 AM
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NORTHGABOY
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P1083, P1085, P0171, P0174, P0301, P0305, P1346, P1348, P0491 & P0492
Mar 9, 2016 at 9:07 AM
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WRENCHTECH
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You have a ton of lean codes and misfire codes. The first thing I would have done is a smoke test to find vacuum leaks.
Mar 9, 2016 at 9:11 AM
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NORTHGABOY
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Can I smoke test it myself somehow or detect leaks another way? I am trying to fix it myself instead of taking it to a shop. I have already changed the thermostat on it myself. If the DISA valve is not functioning right, can it cause some of those codes? Thanks.
Mar 9, 2016 at 11:02 AM
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WRENCHTECH
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If you have a $1200 smoke machine, sure you can do it yourself but i kinda doubt that.
Mar 9, 2016 at 11:26 AM