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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 08-14-2010, 08:36 PM   #1 (permalink)
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Angry Help-1746 code

Have replaced all vaccum hoses and intake gaskets after receiving codes 300. 302 . 306 multiple misfires. checked for holding vaccum at 15 pounds but no power. swapped coils, still reading above codes. Also showing 1746 and 1750 codes. Any suggestions????? Should the secondary air pump run constantly or intermittenly? Could a bad oxygen sensors set cause this problem? Car has 140,000 and never changed oxygen sensors to our knowledge. It runs rough with weak power. Brand new spark plugs, all new vaccum lines, coils seem to be good. AT WITS END.
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