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Cold Start Problems 1 Series 116i

Giles

By Giles,
in BMW 1 Series Forum

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Giles Newbie

Giles

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Ive got problems with my  09 1 series cold start only. Starts from cold missing and very rough idle and black smoke out the back unburnt fuel . Plugged it in and ive got PO300-301-302-303-304 witch is cylinder misfire so in went a set of plugs the old ones were shot and well worn. The other code was P124C (Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start) so i put in a pre CAT lambda sensor. Its starts better but not 100% for sure. Its great when warm/hot. 

Has anyone else come across this problem ...  

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Greydog Grand Master

Greydog

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Afternoon Giles

Welcome to the Forum

I daresay the Crank Case Ventilation system will be sooted up, check all the Vacuum lines and replace if clogged. The last thing would be Coil Packs 

A diagnostic session with INPA?ISTA would tell you much more.

Dave

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