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Discussion Starter #1
Hi friends,
My Nissan Narava shoots black smoke only when its being driven, on idle there is no smoke even if you accelerate.
I have put a brand new turbo and also brand new injector nozzles. that's why I am so disappointed anyone out there who would know the reason please help, the smoke is just too much.

Thank you.
 

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Welcome to the forum.

Have a read of this post, similar problem

 

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Hi friends,
My Nissan Narava shoots black smoke only when its being driven, on idle there is no smoke even if you accelerate.
I have put a brand new turbo and also brand new injector nozzles. that's why I am so disappointed anyone out there who would know the reason please help, the smoke is just too much.

Thank you.
Did you check out Inter cooler and pipe work first.
 

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Hi friends,
My Nissan Narava shoots black smoke only when its being driven, on idle there is no smoke even if you accelerate.
I have put a brand new turbo and also brand new injector nozzles. that's why I am so disappointed anyone out there who would know the reason please help, the smoke is just too much.

Thank you.
I’ve got same problems with my d22 it’s started to put out black smoke when changed to shell eco diesel it started to run better for a while now it won’t rev out and engine cuts out
I’ve ordered a egr by pass to try that next step will be injectors out for testing, Cheers
 

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Hello, Naresh, welcome.

Smoke is definitely black? If so, then of course we are dealing with unburnt diesel.

Air side is good, so it's most likely we can assume that it's not a normal delivery of diesel for this engine state.

The question is why the truck seems to deliver so much more diesel when under load. Of course, more diesel is required in this scenario, but why so excessive.

I think you need to pay your attention to diesel delivery control/supply.

Reading over threads like the one mentioned above may be a big help
 

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Hello, Naresh, welcome.

Smoke is definitely black? If so, then of course we are dealing with unburnt diesel.

Air side is good, so it's most likely we can assume that it's not a normal delivery of diesel for this engine state.

The question is why the truck seems to deliver so much more diesel when under load. Of course, more diesel is required in this scenario, but why so excessive.

I think you need to pay your attention to diesel delivery control/supply.

Reading over threads like the one mentioned above may be a big help
Hi, My Navara d22 is only done 32k with same black smoke problem when it was running it seems like exhaust blockage causing back pressure through the exhaust system the vehicle was serviced before the problem all filters are ok and intercooler all dry no signs of oil around the turbo, My egr by pass is coming from eBay next week, This vehicle done a lot of ideling with few long runs it’s 15 years old I was thinking of disconnecting the back silencer box and trying to start her in case there’s a blockage in the rear silencer, When I worked with Mercedes van centre I’ve seen sprinters not starting when the down pipe was disconnected they start and run ok cause blockage. Cheers
 

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Discussion Starter #10
Hi, My Navara d22 is only done 32k with same black smoke problem when it was running it seems like exhaust blockage causing back pressure through the exhaust system the vehicle was serviced before the problem all filters are ok and intercooler all dry no signs of oil around the turbo, My egr by pass is coming from eBay next week, This vehicle done a lot of ideling with few long runs it’s 15 years old I was thinking of disconnecting the back silencer box and trying to start her in case there’s a blockage in the rear silencer, When I worked with Mercedes van centre I’ve seen sprinters not starting when the down pipe was disconnected they start and run ok cause blockage. Cheers
Thank you will check that side as well.
 

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I’ve got same problems with my d22 it’s started to put out black smoke when changed to shell eco diesel it started to run better for a while now it won’t rev out and engine cuts out
I’ve ordered a egr by pass to try that next step will be injectors out for testing, Cheers
Hi, Replacing injectors on my d22 Navara 05 plate does anyone know the best way to remove the seal around the injector threads. Cheers
 

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Hi, Replacing injectors on my d22 Navara 05 plate does anyone know the best way to remove the seal around the injector threads. Cheers
Got my injectors done ok staight forward enough job just pushed the seals around the injector threads out with a screwdriver applied small amount of sealant when putting seals back into the Cyl, head, The battery is dead waiting for a boost back to arrive to get the truck started again. Cheers Cpeaco.
 

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Hi, Replacing injectors on my d22 Navara 05 plate does anyone know the best way to remove the seal around the injector threads. Cheers
Hi friends,
My Nissan Narava shoots black smoke only when its being driven, on idle there is no smoke even if you accelerate.
I have put a brand new turbo and also brand new injector nozzles. that's why I am so disappointed anyone out there who would know the reason please help, the smoke is just too much.

Thank you.
Hi friends,
My Nissan Narava shoots black smoke only when its being driven, on idle there is no smoke even if you accelerate.
I have put a brand new turbo and also brand new injector nozzles. that's why I am so disappointed anyone out there who would know the reason please help, the smoke is just too much.

Thank you.
If you have had the injectors replaced/reconditioned/moved have the injectors been re programmed to the ECU presuming of course your 25yd is a common rail and if it is be careful as an overfeulling injector can cause massive problems as a previous owner of one of mine found out.
 

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If you have had the injectors replaced/reconditioned/moved have the injectors been re programmed to the ECU presuming of course your 25yd is a common rail and if it is be careful as an overfeulling injector can cause massive problems as a previous owner of one of mine found out.
Hi, My D22 is the non common rail type there’s no solenoids on the injectors it’s just a straight swap, i removed the turbo intake pipe at the weekend to check the turbo all looks ok no wear also the waste gate working ok, The truck only done just under 32k from new, What I found was the intercooler was blocked up with heavy carbon it’s looks as if it been caused by the egr valve tried cleaning it out with brake cleaner no joy to thick eventually used thinners it seemed to do the trick ok, The egr blanking plate been fitted to the exhaust side of the egr valve now, Just waiting to get the truck into my driveway to get the engine out to finish the timing chains when I removed the top timing cover there was bits of plastic broken inside the cover from the chain guides and the top tensioner was out close to to maximum limit, Think its bad luck a combination of faults all happened at the same time when the battery charged up again think it would be better to take the injectors back out again and carry out a full compression test to make all Cyl: are working ok also when the engine out will check the clutch at the same time and remove and clean out the inlet manifold to get the carbon removed, It will be on hold for a few weeks working on my 22 year old merc Vito for mot at the end of the month she requires a lot of welding repairs, bought her back in 2007 the engine still runs great fitted with the old merc 601 engine. Thenks Cheers.
 

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Just put a catch can in mine but even after 280K wasn't that bad in the inlet manifold or intercooler, yours must have a lot of blow by to accumulate that much soot in 32K?
Mind you mine had masses of gunk in top of motor.
 

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Just put a catch can in mine but even after 280K wasn't that bad in the inlet manifold or intercooler, yours must have a lot of blow by to accumulate that much soot in 32K?
Mind you mine had masses of gunk in top of motor.
Hi Mate, The back silencer box in mines is also blocked up with thick carbon when I cut the bolts off and dropped it down there was smoke coming out the silencer box looks like gases being trapped inside the silencer, will have to order a new silencer when I get the timing chains done, Bought the truck new 15 years ago this is the first time it’s gave any trouble so I can’t complaint, Cheers Mate.
 

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Yeah unreal that there is that muck build up, mine now has a 3" system on it which allows it to maybe breathe a bit better but another one here a 2011 has a 3" system but no muffler just a hot dog which sounds **** but as it will be sold not worried.
 

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Yeah unreal that there is that muck build up, mine now has a 3" system on it which allows it to maybe breathe a bit better but another one here a 2011 has a 3" system but no muffler just a hot dog which sounds **** but as it will be sold not worried.
Hi Mate, Are these larger bore exhaust systems specially made up to suit are can you buy a larger bore aftermarket system, Cheers,
 

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Hi Mate, Are these larger bore exhaust systems specially made up to suit are can you buy a larger bore aftermarket system, Cheers,
They were on two of three d22's I bought but they are after market the one with the muffler at least is from DEA performance, the other doesn't seem to have any markings but could be the same, they are made in sections like the original system and fit easily in place they can also be plug and play with the different sections ie replace a hotdog with a muffler and another section with or without catalytic converter.
Not sure whats available elsewhere but several manufacturers in Aust but these were good when I wanted new gaskets and bolts when I changed from one vehicle to the other Exhaust Systems – Specialised Aftermarket Exhaust & More .

Note these systems end up being very close to the firewall you can move the drive train forward by using the alternate fixing holes for the rear mounts but decided against that as the starter motor ends up very close to RH front engine mount so I pushed the firewall back a bit behind the exhaust to give it room for peace of mind at least,
One vehicle was even worse than the other which I found was the rubber body mounts had worn enough to allow the body to move forward almost touching the exhaust and causing what seemed to be brake? shudder in reverse especially that took a bit of thought to find.
Note of the three vehicles here with six rear mounts between them all had crook rubbers so it is obviously a problem and when they fail the motor sits out of square at the radiator shroud, this would also allow the motor to move forward under minor front collision or hard braking causing the fan to hit the radiator or the starter motor to hit the front RH engine mount which did happen in one vehicle here, the front engine mounts are very soft and don't restrict much forward movement.
 
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