Question about BMW 325i
I am guessing the check engine light is on. Scan it with a code reader ($20). You didn't mention what year your car is but most bmws have a 100,000 mile spark plug life span. If you have a misfire code then swap the ignition coil to a different location. Misfire is on cylinder 1 swap the coil to cylinder 4. If you now have a misfire code on cylinder 4 then replace the faulty coil. If you have lean mixture codes check for large cracks in your intake air boots. The oil separator hose also causes a large vacuum leak along with the more expensive vacuum regulator.
Posted on Dec 18, 2016
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Posted on Jan 02, 2017
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