Question about 2003 BMW 325

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My bmw 328i misfire?

When I drive my car it stalls what do i have to fix so that my car wont stall

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  • jbaines84 May 04, 2009

    bmw 325ci convertible miss fire. engine man light comes on and dsc lights. then no power. starts fine wen cold but as it warms up worse it gets.

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If u don't have a check engine light try this procedure to fix it.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Feb 11, 2009

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