2009 CRD Black Smoke after 60k service

[apalsson]

Gents,

I am wrestling with a black smoke problem that I believe started following a 60k service
In an attempt to save some $$$, I took the car to a well known 4WD place rather than my usual Nissan dealer because I had been quoted a much lower price over the phone.
Anyhow, I picked up the car on a Friday and the next morning took off on a trip towing a small van.
During the trip, I noticed that each time I was taking off, I was blowing quite a bit of black smoke whereas before, the engine had been relatively clean.
When I got home, I contacted the shop and told them about this but they were quite evasive and suggested that it had "been a while since they did the service" etc etc.

Anyway, during the service, they had replaced the air filter and not used a genuine Nissan filter. Apparently, they also did other 60k service items as per the schedule.
They had also cleaned the MAF sensor.

I decided not to take the car back there because I could see they were going to charge me their full rates to diagnose the issue. Instead, I took the car to Nissan and got them to replace the air filter with a genuine one (just in case)
This has not resulted in an improvement and the car is still blowing more black smoke than it should.
I mainly notice this when the turbo kicks in, for example if I take off on lights and as the revs hit 1500 - 2000RPMs, there is quite a puff of black smoke.
Also - if I hit the throttle to any extent in normal driving, I can see a black puff as well.

Another thing I noticed after the service was that I was using more fuel than before.

Where do we start looking?
Is this likely to be the MAF? (they are not bl**dy cheap, so I'd hate to have to buy one, just to find that was not the case)
Nissan replaced the air filter so that should not be the issue

Any help would be appreciated

[my third 256]

get some maf cleaner from repco / super cheep or some one like that and do it yourself
plenty of threds on the topic
here you go to the link
http://www.nissanpatrol.com.au/forum...t=clean+sensor

[Hodge]

If they say, they cleaned your MAF I hope they didn't damage it somehow.

[apalsson]

get some maf cleaner from repco / super cheep or some one like that and do it yourself
plenty of threds on the topic

Nissan gave it a clean when they replaced the filter
My concern is just that it wasn't damaged somehow when the service was done.
Should I look at something else as well?

[apalsson]

If they say, they cleaned your MAF I hope they didn't damage it somehow.

Same concern here - and if they did, it will be one heck of a battle getting them to admit to it

[kevin07]

have you checked all your hoses to the turbo that can cause smoke.

[apalsson]

have you checked all your hoses to the turbo that can cause smoke.

Yes, I have just been through those and not found anything obvious

[kevin07]

do you have a boost gauge scangauge like that

[apalsson]

No, unfortunately, I still haven´t gotten around to getting those

[kevin07]

without that it gets a bit harder but next thing blocking the egr can eliminate smoke