Diesel Black Smoke Explained | Bell Performance Video Blog 

Most of the time if you see and semi or a diesel pick up hauling butt down the highway and you see a puff of black smoke come out, or even when a diesel is going from parked to taking off, they will smoke because the driver is slamming the fuel pedal down forcing more fuel into the engine. I do it a lot on purpose when some A-hole is tailgating me, slam the fuel pedal down and cloud them with black smoke to make them back off.

Black smoke, much higher fuel consumption and total lack of power can also be caused by a faulty turbocharger or (like in my case) a broken wastegate operating lever!

Sir, is dirty diesel(biodiesel) can cause black smoke after 3 months using this type of diesel? Should i change my diesel in mote cleaner( branded like shell)

Really helpful! Thank you! Hope you make more videos like such knowledge! May God bless!

I'm not in the States, my problem is black smoke under hard acceleration on a non DPF (removed), EGR blocked, intake cleaned, always used Decarboniser in the fuel as well as a common rail lubricity agent. Vehicle is older Audi Q7 4.2 TDi, which is twin turbo V8. It has been tuned to stage 2.8, the reason not stage 3 is to slightly detune in an attempt to reduce black smoke emissions which it certainly did. I am thinking about taking it back to stage 1, which I found was very economical. Since the Q7 no longer will tow a van this will be the ideal fuel map I believe, as I believe stages 2,3,2.8 are overfueled under hard acceleration. The DPFS always caused problems and since their removal it's been great apart from black smoke under hard acceleration. It may be possible that the intake valves have carbon built up on the valve stem side and so I am looking at trying to remove this soon. So could the soot under hard acceleration be caused from a too rich fuel to air ratio on fuel map 2.8? Or could be partly caused by carbon build up on the intake valves, or both? The Q7 has done 250,000 klms.

Very intresting on soot 👍

Well explained, thanks!

This has put my mind to rest a little. I rebuilt my diesel engine and it has been pouring black smoke under heavy throttle, I know the intercooler is leaking and quite a bit, that will throw the air off.

So how come a lot of high performance diesel engines seem to blow thick black smoke? Do the run them rich on purpose?

It can be contributed to by three causes - dirty or clogged diesel fuel injectors, inadequate poor or non existent diesel engine servicing, or a deliberately set over-rich diesel fuel mixture that puts too much diesel into the engine causing black smoke on acceleration, at a steady speed or under load I.e. towing a trailer with a diesel van truck or car, or operating a machine on a tractor.

Great video

Thank you for the video! Very useful!

what if the white smoke only when semi-cold start and goes away once it reaches normal running temperature is that bad or is it normal? its not that its very cold it hardly need to be cold.

Thank you I have a rang rover 2007 3.6 black smoke when over takeing

Great info! Thanks for your videos.

Thnxxx buddy quite helpful information,👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

I have a 2 L turbo diesel I have noticed puff of black smoke on boost Clears throughout the top end Every gear puff of smoke is that normal I have noticed Oil leaking from my turbo I hope it’s just a return pipe/No cat no DPF

I have a john deere marine engine running it at idle and up to 1750 rpm works perfectly bump it up to 2000 or wide open and bogs down (all new filters and still does it) any advice???

Does any body no I have a kia serento starts no problem blue smoke comes out on first start up clears after few seconds then turns to blk smoke there is no warni g lights on and engine is fine can anybody help

Well explained video Thanks

A comment from Brandon W ---------------------------------------------------------------------------------------------------------- You my friend are a ******* idiot.... Black smoke can also mean higher horsepower, in other words a higher fuel to air ratio. Many do this on purpose. There are different shaped injectors, cat deletes and stacks all to increase horsepower, stop reading out of a book made by Obama and actually learn about diesels **** *** ---------------------------------------------------------------------------------------------------------- Hi Brandon, Thanks for taking to time to comment. Whether or not someone modifies their diesel or uses different injectors or stacks, the principle is the same. Black smoke means unburned fuel, typically from a mixture that is too rich. It doesn't matter the intent. When you see black smoke, there's an excess of fuel relative to the air present in the mix. That's the bottom line. If you want to talk about user intentions, go ahead and talk away.

Thanks good explanation buddy 😀👍

Good job.

How about grey smoke? My 3500 Chevy Duramax pickup blows grey smoke, on a cold start, while idling and when you’re leaving from a complete stop or slow roll.

Or disconcerting the fuzz for smog.

I can not put def in my 2015 ford transit van. I used to do it every week since I drive about 1000 mile a week. What is going on? Please help!!

The black smoke can eather be cause by that stuff but your for getting a couple of things I have a 1996 F-250 with a 7.3 obs I have a smoke switch and a a lope tune and that causes it to smoke and white smoke can be also caused by a blown turbo and Abunch of other things and for the blue smoke it's not blue it's black with a blue tint and that is caused by burning oil like my mud truck it has. A inline 6 hurcules diesel in it its a M35A2C (deuce and a half) and it has a blue tint to it because I'm running it of a 50,50 50 diesel and 50 oil

Good information

I like seeing black smoke when I don’t see it I know I have a problem. #Dieseltruckpulling

Pcv disagrees with your statement on not getting oil in area they shouldn’t be. Ty epa.

hi My mazda bongo has a low rev and it is producing a black smoke. What could be the problem with the van?? Can the thottle body be the problem?? If yes can it be repaired or just replace with a new one .

I have a 2 Liter Diesel with a six gear manual transmission and I usually only get black smoke when accelerating in a gear higher than 4th, do you know why that could be? It does have a dpf and I thought it was just clogged up but I did two 700-800 km trips to and from my university city since I got it so I don't think that thing could be any emptier by now

I have a Cummins diesel on my boat - black smoke... was told to clean air filters. I had them cleaned. Didn’t work. Now I’m told it could be the injectors or turbo 🙈

Hello guys. I was wondering one thing. Normally when a diesel car is remapped for huge hp gains also gain tons and tons of black smoke. Isn't beneficial to balance the fuel:air ratio when remapping for power? And if so why do they smoke so bad?

The inching diesel exhaust smoking

Perfect !!!!!!

Would it black smoke if the turbo is going bad

hallo i have a diesel car there were a problem with the maf just change it for 6 time and the obd still showing that i have same problem but the performance is much better,but i noticed black smoke when i accelerate is that means that i have an air leak?i've checked the turbo lines and i saw little oil in the hoses is that a leak?

White smoke means

This is painful

My 6.4 diesel makes 750 hp and smokes like a freight train but it’s because I have bigger injectors and lots of fuel mods no problems just no fuel mileage

Black smoke can be caused by lots of reasons ie- more fuel, bad injectors or my case faulty turbo veins. Check basics first

get them fix they stink regardless !

Should make it illegal dumbest ego stroke ever

(Smoky emissions in any vehicle is a sign that something is not as it should be). totally untrue, where's your facts ? This is only true if you drive a gas engine which i assume is all you have driven in your life. Totally false on a diesel