Hi, I am looking some advice. I have just bought an 07 120D M-Sport however I am noticing a slight problem with it on cold start up.
It coughs on start up and runs a little rough for about 3-5seconds letting a puff of blue/black smoke out of the exhaust.
After those 3-5seconds it clears and idles normally.
It never does it when started warm or even if it has sat all day. It seems just to be on first start in the morning time.
There is no problem with power or performance, no noises or rattles. Car pulls great through all gears and is very responsive.
It has had brand new turbo fitted 10,000 mile ago and new glow plugs.
Would it be faulty/dirty EGR valve or dirty injectors?
It coughs on start up and runs a little rough for about 3-5seconds letting a puff of blue/black smoke out of the exhaust.
After those 3-5seconds it clears and idles normally.
It never does it when started warm or even if it has sat all day. It seems just to be on first start in the morning time.
There is no problem with power or performance, no noises or rattles. Car pulls great through all gears and is very responsive.
It has had brand new turbo fitted 10,000 mile ago and new glow plugs.
Would it be faulty/dirty EGR valve or dirty injectors?
120D M-Sport — Cold start rough and puff of smoke
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