Truth about black smoke ?

[2000f2507.3l]

Im always reading or hearing about how black smoke from your exhuast is a waste of fuel. When you install a programmer,chip,tuner it seems like most trucks roll out the smoke. Then you get people posting on threads and all over the internet that this black smoke caused from the programmer,chip,tuner is a waste of fuel. My truck blew no smoke at all w/o a programmer and blows smoke with it. Now im getting better mpg with the programmer and its blowing black smoke. So the BIG QUESTION that everybody seems to know so much about is.. how is the black smoke a waste of fuel when most programmers,chips,tuners are actually getting you better miles per gallon and blowing black smoke at the same time?????????? Makes no sense to me

[Six0~Stroker]

When you are driving normally are you pouring black smoke out constantly? No...


Black smoke is unburnt fuel... Diesel or gas vehicles both will smoke black if they are running rich...

tuners DO give you better MPG's but NOT if you drive around rolling coal everywhere!

[Toms01PSD]

Uh, I have yet to get better mileage with my chip on any other setting except for stock. Full tank of fuel I got 8.5 mpg on my 80DD tune and 14.4 mpg on my 100 Performance tune. I didn't try the 65 Tow or 120 Race tune. On the stock setting I get anywhere from 15.5-18 mpg. Highest is 18.0 mpg on the dot.

All of these results are hand calculated.

[Eric@PTP]

Originally Posted by 2000f2507.3l

Im always reading or hearing about how black smoke from your exhuast is a waste of fuel. When you install a programmer,chip,tuner it seems like most trucks roll out the smoke. Then you get people posting on threads and all over the internet that this black smoke caused from the programmer,chip,tuner is a waste of fuel. My truck blew no smoke at all w/o a programmer and blows smoke with it. Now im getting better mpg with the programmer and its blowing black smoke. So the BIG QUESTION that everybody seems to know so much about is.. how is the black smoke a waste of fuel when most programmers,chips,tuners are actually getting you better miles per gallon and blowing black smoke at the same time?????????? Makes no sense to me

The aftermarket tuning will burn the fuel more efficiently and use less of it under normal driving conditions. But under heavier throttle it will inject more fuel sooner into the combustion chamber than the turbo is putting air in so the fuel/air ratio is rich until the turbo catches up. But changes in timing and injection pulse width will improve power and economy even though you may see some more soot out of the exhaust.

[2000f2507.3l]

Originally Posted by Six0~Stroker

When you are driving normally are you pouring black smoke out constantly? No...


Black smoke is unburnt fuel... Diesel or gas vehicles both will smoke black if they are running rich...

tuners DO give you better MPG's but NOT if you drive around rolling coal everywhere!

true true.

[Turbostang500]

Originally Posted by Six0~Stroker

When you are driving normally are you pouring black smoke out constantly? No...


Black smoke is unburnt fuel... Diesel or gas vehicles both will smoke black if they are running rich...

tuners DO give you better MPG's but NOT if you drive around rolling coal everywhere!

Not saying 6.0 is wrong, just wanting to touch on this a little more.

Black smoke is more like burnt fuel with a lack of oxygen to clean it up.

And it isnt a waste of fuel if you have enough oxygen to make it run clean!!

[Im_Strokin_ur_Cummins]

yep and roaling coal all the time will eventually eat your engine. Since it over fuels the engine the fuel runes down the cylinder walls and takes away the lubrication. In time it will destroy your engine. I just stick to coal rollin on back roads and at the track