Black smoke
 

My truck started smoking all the time, it is black smoke, not sure what would make it smoke black all the time, even at an idle u can see it, and under slight acceleration. i tried taking off the chip and no change at all, i have a 4in exhaust, AEM Brute Force HD Diesel Intake and Diablo Sport Predator Programmer , any help would be great, thanks

try clean your air filter...

stuck open injector or leaking injector. some way or another your getting to much fuel or more fuel in then before or like mentioned above your air flow is to restriced

also maybe try and run some seafoam and fuel system cleaner that might help:c:

check your MAF sensor... it could be dirty/oily and it could be giving the ECM weird readings

Air cleaner is clean, ill try cleaning the maf sensor and see if that will help.
also my fuel mileage went from 18 to 12mpg :scare2:

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Is there a way that i can check my injectors, to see if one is stuck open? also what should i use to clean the maf sensor?

maf I would try brake kleen

They do make MAF cleaner... They should sell it at any parts store

get an auto enginuity and do a injector test to test them, and maybe a maf reading

not so good of an idea, brake kleen can melt or damage the MAF, better to use MAF cleaner

Seafoam also not such a great idea..... Alcohol=drying out your fuel system!

thanks man I did not know this
WOO HOO :jump: I learned something today it wasn't a complete loss hahaha

I cleaned the MAF sensor this morning with electrical cleaner. semed to help some, just smokes black when its first started for about 5 min and the while under slight exceleration, not sure if the fuel milage got any better, working nights and not had any time to go anywhere, i am also going to try cleaning the map sensor and the iat sensor, and see if this will help. i have a nabor that said he can check my injectors for me, but he is working this week, mabey this weekend i can get them checked and make sure that they are good.

you need to make sure about an injector Asap. you dont want to drive it and melt a pistons with to much fuel. I believe this is correct info

Also a boost leak would cuase this!

I cleaned the map sensor, it had some black on it. It has goten better, not smoking as much as before, mabey a min or so at start up and then it still smokes under slight exceleration. not sure if this is normal or not, does it with the programer on and off the truck. Is there an easy way to check for a boost leak?

Yea, drying out all the water :tttt:

Bad fuel possibly...

Have you checked your oil level? See if its creeping up or smells like diesel fuel.

and all the lubrication in your fuel system




"From: DBLR
Have you not read where it is not advised to use any fuel additive that has alcohol in it unless you are using it to de-gel your fuel? Yes it may clean up your injectors and clean some carbon but it is not good for your fuel system and can even hurt it. To sum it up I’ll copy what DD had to say in another post about it “Fact is that alcohol kills lubricity, and that is the last fuel additive that should be used on a diesel.”

Next 2 quotes are from: DULUTH DIESEL
Alcohol kills lubricity. Every major additive manufacturer, including the stuff that Cummins puts their endorsement on, know that alcohol is a bad deal for diesels. You are not doing your engine any favors using SeaFoam. There are better diesel fuel additives that do not use alcohol.


To be fair, SeaFoam itself isn't a bad product. While it is widely known that alcohol has no place in a diesel fuel due to lubricity issues, I have used SeaFoam in gasoline engines, especially small engines, and have had good results. The only issue with SeaFoam in a diesel application is the fact that there is alcohol in it."

What is auto enginuity? Where do you get this, can it be rented and what would the cost be for this? What all can it do?

im new to the the diesel world im trying to make my diesel smoke and more power i have 5" straight pipe exhaust and a hypertech programmer turned all the way up and it barely smokes and has no highway power.

What kind of truck do you have??? With what you have done you should see a significant diffrence in power but if your wanting to pour black smoke and up your HP even more your going to need to get new injectors.

04 cummins 4x4 automatic with stacks

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i was told to sell hypertech and get a smarty and get the bully dog fuel pump

Just so you know smoke does not equal power, smoke equals partially burnt fuel

A Smarty will kill your stock auto, and I have never heard of a bullydog fuel pump, unless you mean an Airdog fuel pump, you can also get a FASS but all these pumps do is keep the CP3 well supplied with fuel, which is good for making power

Injectors are a waste on stock turbo trucks, all you will do is get too much fuel, too much heat and too much smoke, you'll burn up your engine and thats all you will get


Smoke is pointless, A little smoke is ok but a lot is just stupid!

Not totally true, I've seen a cummins with 50hp injectors, airdog 100, a better TC, 4" straight pipe, with an MP-8 stacked with a smarty and put out close to 585 HP with the stock turbo.

Wow! I have over 100k on Flux Is and my engine is going to burn up? Really?

You should really qualify your statement...

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I find my 4" straight pipe, AirDog 100, Flux Is, 6spd, and SmartyJR a very driveable combination...and once its warm, I get almost no smoke even at WOT (unless I purposely lug the engine). Even before the Smarty JR, the Flux Is yielded almost no smoke, and no more than stock injectors.

And that's with 250k on the clock and a stock turbo.

ok i need a honest opinion i pull wait and pull 30k pound trucks out of the mud at my job. my auto tran is not stock it can handle 800 hp. im looking for power and pullin torque what is the best way

No such thing as the "best" way, it's whatever way works for you. Check out the aftermarket forum for your truck and just do some reading, everyone has thier own combo that works best for them.

And exactly my point steved. Alot can be done with the stock turbo on the Cummins motors.