I think I read that the Ecoboost engine has a special shutdown mode that lets the turbos cool down gradually, keeps pumping oil to them. There has been after market kits for older trucks to do the same thing.
I think maybe you aren't understanding that it appears they have done this on purpose. Throwing more fuel at it gets the turbos spinning and warmed up at first start. That way there is some heat in them so when an abusive driver turns the corner and mashes the gas they aren't completely cold.
Or hell, maybe im not understanding it correctly, but I can see no other logical explanation.
I have a 2011 F150 with the 3.5 ecoboost. I have noticed when I start it in the morning (cold start) I get some black smoke that lasts about 10-15 seconds, after that everything appears to be normal. I have taken it back to the dealership and explained the situation to them and they are totally unaware of what causes the smoke and have nothing in their service information stating if this is a normal process or not. Does anyone know for sure? Dealership seems to be clueless.
All turbos used for pulling heavy object should be allowed to cool down by idle the engine a few minutes. We have to do this on our diesels. The barrings and the actuators need a little time to cool down. This will save you a boat load of money down the road.
Cold startups do burn more fuel to allow the engine/turbo to heat up.
I also read a recent article where Continental worked on a new DI setup that cures the cold-start soot problem using solenoid technology. So apparently, the OEM's are aware of this issue and it seems the heart of the issue is the solenoid actuated injectors and how close to the minimal amount of fuel they can get when lighting off a cold engine. It seems like other than Continental's solution, everyone else is looking at Piezo style injectors like in the new Diesel motors to get the fuel metering accuracy for cold starts.
My F-150 ecoboost runs super rich when first started when cold. So rich that it will puff the black/unburnt fuel from the exhaust. This will happen when just idling or first accelerating off when the engine is completely cold.
Once the engine is warm the exhaust looks fairly clean
Anyone else noticing this?
PS I am aware that all engines run richer when cold until warmed up. But I just want to see if all ecoboost engines are doing this.
Mine does this too exactly. I have a 2012 f-150 ecoboost with 5000 miles. Dealership mentioned it was a standard operation of this engine.