|
|
|
2010 2011 BMW 5 Series Forum F10 N55 cold start at -42 Celsius here in Canada |
|
Post Reply |
|
Thread Tools | Search this Thread |
02-13-2019, 12:02 AM | #1 |
New Member
2
Rep 15
Posts |
N55 cold start at -42 Celsius here in Canada
Does anyone has any idea why that black smoke is comming out ? Only few first seconds then goes to normal white
|
02-13-2019, 07:45 AM | #4 | |
Lieutenant Colonel
587
Rep 1,907
Posts |
Quote:
At startup these engines run a cold start mode to light off the catalytic convertors. It runs very rich to start at all in cold conditions, and keeps running rich with combustion in the cats. I'm not shocked to see evidence of running rich. The snow makes for a clear contrast that we may not normally observe. Personally, I would not conclude there was anything amiss unless there are other indications of problems. |
|
Appreciate
0
|
02-14-2019, 11:08 AM | #8 |
New Member
2
Rep 15
Posts |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|