Exhaust smoke using remote start

[Deadeye]

I have noticed black smoke from the exhaust when I use the remote start on cold start up. Anyone else seen this?

[Sierra706]

I have noticed black smoke from the exhaust when I use the remote start on cold start up. Anyone else seen this?

Significant? Or a few small puffs initially?


Sent from my iPhone using Tapatalk

[SirenRed16]

I have noticed black smoke from the exhaust when I use the remote start on cold start up. Anyone else seen this?

Does it have a aftermarket muffler? Does is throw black smoke when the truck has been sitting for a few days?

Sent from my SAMSUNG-SM-N920A using Tapatalk

[grizzlyltz]

My 6.0 does the same on cold mornings also but only when it’s around -20 , just a puff.




Grizzly

[Deadeye]

Stock muffler. Smokes for a couple seconds, 3 or 4 puffs. Cold start after sitting one day or 5. Been 15 to 25 degrees. Will check again middle of week when it gets to mid 30s. 

[MixerDriver]

I always get a puff of black smoke on startup when it's below freezing. It's normal for direct injected engines to run a little rich when cold. That's more than likely the puff of black smoke you're seeing. 

[03dyna]

Yes I see a lot of black smoke on start up and when I let off gas for the first few minutes when it is well below freezing. 

[Hoginedgewood]

Fuel pump runs when we open the door, that doesn’t happen with remote start, or does it. Don’t know if that could be it.

[Sierra706]

Fuel pump runs when we open the door, that doesn’t happen with remote start, or does it. Don’t know if that could be it.

It does. Part of the remote start procedure


Sent from my iPhone using Tapatalk

[2016 Sierra Owner]

This is normal. Your just seeing it because you used remote start and can see the back of the truck. It does the same thing if you get in and turn the key ,but most people are not looking in the mirror at that time to see it happen.

[MikeNH]

Common on direct injection engines in the cold or when you get on the throttle after a long time of driving gently.

[cossack]

Common on any engine....its dumping a ton of fuel to get the thing started. Remember that liquid gas doesn't burn its the fumes that do. When its insane cold outside you need to dumb a crap ton of fuel in to get some of it to evaporate otherwise truck wont start. Black smoke is unburned fuel. Your truck is fine.

[cossack]

10 hours ago, MikeNH said:

Common on direct injection engines in the cold or when you get on the throttle after a long time of driving gently.

Its common on any type of fuel system that runs on decomposed dinosaur squeezings.

[Rob Okray]

Truck is so quiet, lets me know it's running.

 

[MikeNH]

57 minutes ago, cossack said:

Its common on any type of fuel system that runs on decomposed dinosaur squeezings.

 

The black smoke is far more common on GDI engines. Occasionally I'll see it on port injected engines but on all the vehicles I rented when I traveled for work (40+ cars a year for 9 years) anything with GDI and a remote start would burp out some smoke when started on cold days.