smoke

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you need some electraica switch cleaner.. and clean the end thats in the pipe between the air filter and the Turbo
 
not sure where a patrol egr is, that if you even have one, but the MAF will be where your air filter is. look at the air filter housing, follow towards engine, should be a plug/wire coming out of it, thats the sensor...
 
as suggested before, clean air filter and passageways :thumb2

Then if as already mentioned its the cobwebs, try sticking in a jug of millers diesel power booster. As a cleaner that produces some excellent results.

One of our local taxi firms if a car fails or looks like its going to fail on emmisons stick some of that through on a mega dose. usually works. Shifts the crap :thumb2

Theres loads of support on various other diesel powered forum threads for this product but just to reintroduce an old discussion theres also support for chucking acetone in as a boost/cleaning agent :naughty

cheers daved i did just that and the smoke is no more.. at least it now seams theres noting wrong with my turbo:thumb2 and i never bought a maf:thumb2:thumb2

also thanks to everybody else for there replies
 
Black smoke is unburnt fuel, what also happens is because diesels run at a lower exhaust temperature especially round town, small amounts of unburnt fuel mix with the carbon on the inside of the exhaust, then when you give it some welly and the pipes get a rush of gas hotter than of late, this fuel is vaporised and comes out as black smoke, all normal unless the smoke continues, Rick

Not entirely correct. Been doing a bit of refering to boffins your answer was a bit too definitive and set me off wondering.

First of all to state categoically it is or isnt whatever you need to analyse the stuff coming out of the exhaust.

Then there are several options, 3 main ones are:

If it has a high or higher than usual hydrocarbon (aka soot) content it is an excess of fuel burning and sooting up, could be little or no unspent fuel in there. All depends upon what "burning capability" your engine has.

If your fuel is not getting burnt it can have a cleansing effect, almost small scale version of what Larson has successfully done with the millers concentrate. This will shift the crap and either temporarily if its just a one off clean out or longer term if not fixed will give the effect again of black smoke.

The third is unspent fuel vapour as you describe.

Hope that clear sit up.

Youve clearly worked on one basis, I was always told another but the truth is either or somewhere in the middle.

Presume nothing.
 
i did save me some hard earned but when theres none left in the tank the smoke comes back so im blaming the injectors.. dont ask me how i come to that comclusion cos i honestly dont know:lol:lol:lol but im not thinking its the turbo and thats what maters:lol

larson
 
Refer to my earlier posts, injector cleaner does not work, full stop as you have now proven, the fact is nothing can dissolve carbon, and that is what most times is the cause of injector problems, others are dirt/water/overheating/deformation of injector elements, you can test your injectors yourself, if you want to know how to do this let me know, but test them before buying recons or new as you can save yourself a lot of dosh, Rick
 
Refer to my earlier posts, injector cleaner does not work, full stop as you have now proven, the fact is nothing can dissolve carbon, and that is what most times is the cause of injector problems, others are dirt/water/overheating/deformation of injector elements, y

Disagree completely, very little has been proven here. It all depends what level of dissolving and level present of carbon you're talking about , if its baked on product on the injectors that's the primary problem without mechanical issues.

If you want to prove that get an engine component that has been used ,obviously not a ridiculously hard baked 50 year old knackered thing, and is worn and dirty/sooty . Leave it to soak in a decent propriatory cleaner and just watch. Judging by your last comment you will be surprised.

As both my trades cover engineering and investigation with a healthy dose of cynicism added, I was pleasantly surprised too by the results.

Of course the injectors on board will have other wear problems as youve intimated, thats life and fair wear and tear so no one product is a cure all.

Also in use of course the components do not get a soaking of pure product. However over time :thumbs
 
One thing thats just jogged the memeory cells mentioned to me this morning about this, does anyone remember the launch of Shell Power Plus in the 80's ??

That created quite a stir with its carbon and other cleaning properties :thumb2
 
all i can say is ... i put injector cleaner in every 2 tankfulls ( red ex injector cleaner ) ..... after rick stripped the engine and i saw the amount of crap around the injectors i aint gonna be using it no more ..... but you pays your money and you makes your choice i spose .
 
One thing thats just jogged the memeory cells mentioned to me this morning about this, does anyone remember the launch of Shell Power Plus in the 80's ??

That created quite a stir with its carbon and other cleaning properties :thumb2

If it worked and was that good why is not still around. Rick
 
all i can say is ... i put injector cleaner in every 2 tank fulls ( red ex injector cleaner ) ..... after rick stripped the engine and i saw the amount of crap around the injector i ain't gonna be using it no more ..... but you pays your money and you makes your choice i s pose .

Fair point but seriously flawed as a decent evaluation how mucky were they before you put the stuff through ?

As a matter of fact I don't regard these products as a solution ie a liquid decoke. However they do seem to help. I'd be very interested in how solarman justifies his comments in the face of the alleged shell fiasco , the results of my experiment (which there was a lot more to) or the fact that retailers and manf are able to sell these things without comeback
:nenau
 
i always figured the special fuels and the de coking additives were more for cars that are already fairly clean, and you use these to keep them that way. I never regarded them as a solution to removing hardend carbon deposits from old parts, because they dont, at least not in any permanent way?!
 
may be they wont fix it long term but atleast for now i dont have to look at black smoke in my mirrors:D

fairly happy larson
 
Fair point but seriously flawed as a decent evaluation how mucky were they before you put the stuff through ?

As a matter of fact I don't regard these products as a solution ie a liquid decoke. However they do seem to help. I'd be very interested in how solarman justifies his comments in the face of the alleged shell fiasco , the results of my experiment (which there was a lot more to) or the fact that retailers and manf are able to sell these things without comeback
:nenau

Due respect to Briggie, but he was looking at the general combustion area, and what all this is about is the injector internals, the most usual carbon problem with injectors is obstructed or partly obstructed nozzel holes which cause poor spray patterns and or carbon on the needle seat which cause poor atomization and dripping, there is no product that will cure these, the carbon in question is already subjected to to 2000 psi diesel fuel and I have had such injectors on the test bench subjected to much higher pressure with calibration fluid and never has it been possible to clear a blocked nozzel hole, mechanical methods are needed, I do not have a background in chemistry, but I have been dealing with all types of diesels for over 40 years, and my experience of most "mechanics in a tin" are completely negative, Rick
 
Due respect to Briggie, but he was looking at the general combustion area, and what all this is about is the injector internals, the most usual carbon problem with injectors is obstructed or partly obstructed nozzel holes which cause poor spray patterns and or carbon on the needle seat which cause poor atomization and dripping, there is no product that will cure these, the carbon in question is already subjected to to 2000 psi diesel fuel and I have had such injectors on the test bench subjected to much higher pressure with calibration fluid and never has it been possible to clear a blocked nozzel hole, mechanical methods are needed, I do not have a background in chemistry, but I have been dealing with all types of diesels for over 40 years, and my experience of most "mechanics in a tin" are completely negative, Rick

Its never been disputed that theyre not the be all and end all and knackered components will never require anything less than mechanical repair or replacement, but theres a lot out there saying they do have some effect. Im chemically illiterate but Im lucky I know several chemists "in the trade"

Simply increasing pressure through a nozzle and failing doesnt really prove a lot apart from its still blocked in the context of lotions and potions.

My own experiment subjected 8 just about equally sooted and burnt valves from the same engine to a good soak in various fluids. The results were interesting to say the least, all I'll say is the one that had been in the injector cleaner definitely faired better against the control in the dulux colour chart experience.

Interesting you have sidelined into injector talk because theyre not the only thing that can be easily killed or cured and cause smoke as allegedly occured with the injector/engine cleaning components in the petrol mentioned earlier.

Very narrow minded to look only at them :thumb2
 
indeed daved , dont you just love how the group digresses threads :lol

A clear but out of context attempt at irony

Theres a lot more than injectors that cause smoke, injector cleaners touch a lot more than the injectors on the way through so really on this occasion sidelining as opposed to digression isnt really appropriate is it :rolleyes:

Best bit of all the product I mentioned that kicked it all off is not strictly an injector cleaner :lol
 

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