Black puff of smoke at start

[14SLTZ71]

IMG_0489.JPGHopefully this works! If it does then here ya go.

Yea, that will work. This should put the black smoke at startup debate to rest.

[Kx250f]

I would hope so but I'm sure some people will still think something is wrong........freaking people ;)

[14SLTZ71]

somebody please combine all these black smoke at startup threads. thanks

[Jbrock5]

My brand new 2014 Silverado has this Black Smoke on Cold Start Issue.

When I called the dealer, they said "I hadn't heard that one" "no PI in my system".

 

I called GM Customer Service. Same story...

Called Dealership back with the #PIP5189: Black Smoke on Cold Start bulletin from this forum.

Surprise. They found it in the system.

 

Long story short. Bring it by for service evaluation.

 

I've got a bad feeling about this...

 

Check out these YouTube videos showing the problem.

 

 

 

 

[Silverado-Hareek]

Yea, that will work. This should put the black smoke at startup debate to rest.

 

Nice post. I can say that I've used nothing but Shell gasoline (which is Top Tier as that document says) since I bought my truck in February and I have no black smoke on start up. I'll occasionally see some white smoke at start up but it only lasts a few seconds and seems to be consistent with typical white smoke/steam from an exhaust system. My wifes Hyundai, which also has a GDI engine, does the same thing as my Silverado.

[14SLTZ71]

Nice post. I can say that I've used nothing but Shell gasoline (which is Top Tier as that document says) since I bought my truck in February and I have no black smoke on start up. I'll occasionally see some white smoke at start up but it only lasts a few seconds and seems to be consistent with typical white smoke/steam from an exhaust system. My wifes Hyundai, which also has a GDI engine, does the same thing as my Silverado.

I see white smoke sometimes also. Maybe it's water trapped in the exhaust system and then heating up? I hope anyway.

[14SLTZ71]

For those of us who were wondering what top tier gasoline is: Here is a link to a page with a video about top tier gas

 

http://www.toptiergas.com

 

 

Edit: here is a list of the current top tier gas retailers.

[Yzkiley]

Well I might as well go ahead and add another 2 bits. Just purchased a 2014 kia optima sx gdi turbo for my wife. Maybe someone here could explain why this direct injected engine doesn't puff black smoke at start up if this is such a normal condition as others have posted. Like I said in my earlier post glad this smokerado of mine has a 160k warranty. We will see just how normal this really is as time goes on. IMO I don't think this is normal.

[14SLTZ71]

Maybe Kia uses a different cold start process, maybe GM is just feeding us a load of crap, who knows, the PI explains what GM claims the reason is for black smoke at startup.

[fondupot]

Cold...? 84 deg is not cold...the temperature today late afternoon when my truck belched smoke like an old diesel on a "cold" start up... won't even address the gdi statement. .. Black smoke from any engine is unburnt fuel. . What does unburnt fuel do to cyl walls, 02 sensors and cats? Sure doesnt make them last longer does it?

 

Cold start does not relate to the ambient temperature. It relates to the engine temperature. If you park your truck at 6pm then let it sit all night and start it up at 6am, that is considered a cold start since them motor has cooled off.

 

 

 

Well I might as well go ahead and add another 2 bits. Just purchased a 2014 kia optima sx gdi turbo for my wife. Maybe someone here could explain why this direct injected engine doesn't puff black smoke at start up if this is such a normal condition as others have posted. Like I said in my earlier post glad this smokerado of mine has a 160k warranty. We will see just how normal this really is as time goes on. IMO I don't think this is normal.

 

Your V8 has twice as many cylinders as a Kia 4 banger. More displacement will result in more smoke. I had a 2012 Optima SX turbo and it would puff on start up. It would also puff after I gave it WOT.

[2014 Sporty Shorty]

Some of these responses are just a little bit silly, this is how ALL di vehicles work upon startup, this isn't something new. The Chevy 2.0 turbo engine does it, the 1.4 turbo does it, the 3.6 does it, the new C7 does it, the 3.5 ecoburst does it......see my point? It's a trait associated with direct injection engine upon startup, completely normal. There's no need for the worry warts to bother dealerships with this.

[2happyhicks]

Some of these responses are just a little bit silly, this is how ALL di vehicles work upon startup, this isn't something new. The Chevy 2.0 turbo engine does it, the 1.4 turbo does it, the 3.6 does it, the new C7 does it, the 3.5 ecoburst does it......see my point? It's a trait associated with direct injection engine upon startup, completely normal. There's no need for the worry warts to bother dealerships with this.

Obviously not..I have a 2013 Traverse with the DI 3.6... not one puff of black smoke... GM is feeding you guys a load of Bull.. and you're falling for it...

[Jbrock5]

Overreaction maybe, but silly. Not really.

 

Given the extraordinary number of recalls on this redesigned engine, combined with an average cost of 40k.

This so called "normal condition" of DI engines is at least disappointing and at most embarrassing.

[KARNUT]

I had a couple of Fords that didn't puff black smoke and used a quart of oil every 2500 miles, it was called normal. My 14 puffs black smoke sometimes, uses no oil and does great on gas, Ill take the puff.

[fondupot]

I see white smoke sometimes also. Maybe it's water trapped in the exhaust system and then heating up? I hope anyway.

 

Most likely steam. Condensation builds up inside the exhaust after it sits, and when you start the motor, the heat vaporizes the condensation creating steam.

 

But if its HUGE billowing clouds of white smoke....then you have a bigger issue at hand.