Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!
1 - 11 of 11 Posts

·
Premium Member
Joined
·
22 Posts
Discussion Starter · #1 ·
Hi, I need some help with my 2006 Silverado Duramax. Here's some background info. All stock.
New engine about 115K mileas ago,
New injectors about 50K miles.
New turbo about 3K miles.
I have had the truck for about 4 years.
This truck has always had an issue with too much diesel soot out the exhaust. Even w/o any load, it rolls smoke pretty badly. Then when I hookup my 48' Gooseneck trailer, its worse. Fuel mileage is about 15 w/o trailer and 8.5 with. It is ruining the side of my trailer. I have an EDGE Evolution controller and have tried using the economy settings, but still pours out soot. Power is good for what I need but too much soot, and lack of mileage.
Can anyone help me with this issue???
Thanks,
Dan
 

·
Registered
Joined
·
101 Posts
Do you know what tune is on it? Almost sounds like the injection timing is late.

Sent from my PH-1 using Tapatalk
 

·
Premium Member
Joined
·
22 Posts
Discussion Starter · #3 ·
If you are talking about the ECM programming, I just had the stock Chevrolet program reflashed in it after replacing the turbo. I thought maybe the previous owner had a hopped up tune in it. There wasn't any difference.
Dan
 

·
Premium Member
Joined
·
5,057 Posts
Hi, I need some help with my 2006 Silverado Duramax. Here's some background info. All stock.
New engine about 115K mileas ago,
New injectors about 50K miles.
New turbo about 3K miles.
I have had the truck for about 4 years.
This truck has always had an issue with too much diesel soot out the exhaust. Even w/o any load, it rolls smoke pretty badly. Then when I hookup my 48' Gooseneck trailer, its worse. Fuel mileage is about 15 w/o trailer and 8.5 with. It is ruining the side of my trailer. I have an EDGE Evolution controller and have tried using the economy settings, but still pours out soot. Power is good for what I need but too much soot, and lack of mileage.
Can anyone help me with this issue???
Thanks,
Dan
Black smoke,too much fuel, which does not do your fuel mileage any favors.

What are your balance rates, Fuel Rail Pressure, Desired and Actual?
 

·
Premium Member
Joined
·
22 Posts
Discussion Starter · #5 ·
Balance rates are good. Don't know the fuel rail pressure. Before replacing the injectors, I would get a "fuel rail pressure low" code. But not since replacing the injectors.
Dan
 

·
Premium Member
Joined
·
26,484 Posts
Boost leak test?
 

·
Registered
Joined
·
4,958 Posts
Hi, I need some help with my 2006 Silverado Duramax. Here's some background info. All stock.
New engine about 115K mileas ago,
New injectors about 50K miles.
New turbo about 3K miles.
I have had the truck for about 4 years.
This truck has always had an issue with too much diesel soot out the exhaust. Even w/o any load, it rolls smoke pretty badly. Then when I hookup my 48' Gooseneck trailer, its worse. Fuel mileage is about 15 w/o trailer and 8.5 with. It is ruining the side of my trailer. I have an EDGE Evolution controller and have tried using the economy settings, but still pours out soot. Power is good for what I need but too much soot, and lack of mileage.
Can anyone help me with this issue???
Thanks,
Dan


when the injectors were replaced, were they replaced with factory size injectors or with %over injectors? if they were replaced with modified injectors, was the tune rescaled for them?

Could also be a boost leak, there pretty common and would give you sooty black smoke.

At the end of the day black smoke is excess fuel, so either the tune is putting in too much fuel, or fuel at the wrong time, or your not getting enough air to burn all the fuel.
 

·
Premium Member
Joined
·
10,656 Posts
Could possibly be the Edge tuner as they were known to cause black smoke. I'd put it back to stock and see what happens.
 

·
Premium Member
Joined
·
22 Posts
Discussion Starter · #9 ·
The injectors are stock units. This problem was present with the old injectors also. As far as boost goes, while towing, I get about 17-18 lbs. this is the same with the old turbo. Is this a good number or should it be higher? Should I hear a hissing noise (?) if I have a boost leak? Thanks for the reply.
Dan
 

·
Premium Member
Joined
·
22 Posts
Discussion Starter · #10 ·
The ecm was reflashed to the stock Chevrolet specs after putting on the new turbo.
Dan
 

·
Premium Member
Joined
·
26,484 Posts
With a trip down the plumbing aisle, you can inexpensively assemble your own boost leak test kit.

 
  • Like
Reactions: reddogg12
1 - 11 of 11 Posts
Top