E89 28i Cold Start

T

twomorelaps

Member
Hi All,

Had a couple of separate occasions with more than usual levels of smoke coming from the exhaust when starting the car from cold.

Its not white or blue smoke more light grey and definitely not jet black, there is no sulphur smell and it disappears once I've driven a couple of hundred yards. It appears to happen when the car has been stood for a few days.

1st time it happened a few weeks ago i put catclean in and this seemed to work, i also cleaned inside the exhaust tips as these were pretty sooty.

After being stood for a couple of weeks away on hols i fired it up this morning and got a repeat of the same problem, billows of smoke that disappeared once i drove up the road, there was also a soot in the exhaust tips again but not to the same level as previous.

There have been no warning lights, drop in performance, nasty noises or visible smoke in the rear view once its up to temp. Between the 1st and 2nd time of it happening it has done maybe 2,000 miles half of which was driving to Spa in Belgium and back.

Not an easy one to diagnose but any ideas or anyone had anything similar?

Cheers
 
If it doesn’t smell and your coolant tank level hasn’t dropped then…not sure what it could be bar condensation..
 
Is it worth leaving it a few days to replicate the same conditions then pop the plugs out to see if there’s fuel on them?
I know you say there is no smell, but after trying to diagnose a red light on a roof failure which turned out to be yellow light (chap was colour blind), I would rather start with the basics.
 
enuff_zed said:
Is it worth leaving it a few days to replicate the same conditions then pop the plugs out to see if there’s fuel on them?
I know you say there is no smell, but after trying to diagnose a red light on a roof failure which turned out to be yellow light (chap was colour blind), I would rather start with the basics.
Click to expand...


:tumbleweed: :rofl: :thumbsup:
 
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