2009 CRD Black Smoke after 60k service

[apalsson]

That is quite interesting and quite the opposite driving style I had adopted to save on fuel consumption
Guess that is another reason to get to the bottom of this "black smoke issue"

[apalsson]

Scangauge is here! Exciting days

Does anyone know if it is possible to program up a gauge to read MAF sensor voltage?

[kevin07]

Just a couple of thoughts. Have you checked the obvious, the oil level. i have had trouble with my Patrol and also with a Merc Vito work van, that smoked after service and turned out that the service mob had overfilled them. There is also the issue of what oil was used in the motor. Some are better than others and if you go to a cheaper serviceman you sometimes get cheaper products being used, as is evidenced by the after market filter fitted.
Finally, fuel pump timing adjustment can cause black smoke and change fuel economy, but why the hell anyone would change pump timing on a service I don't know.

no timing on the crd

[kevin07]

Buy a scan gauge or equivalent.
I cannot stress how valuable they are for the CRD's.
They pay for themselves in fuel savings alone because you can see when you are using the most fuel and even a minor adjustment in driving techniques can save you a significant amount.

Good idea to go back to the Nissan Air Filters, the CRD's are touchy about air flow.
It didn't help you this time but I always used genuine after several forumites encountered issues with afternarket jobbies

Black smoke is burnt fuel (usually overfuelling/MAF/Boost) white is unburnt fuel (usually low compression) and blue is oil so your noticing that the fuel economy has dropped and black smoke is part of the same issue I reckon.
If the dudes who cleaned the MAF damaged it that should show up during voltage tests but the symptoms point to eliminating the MAF as a problem first.
It is also possible they have damaged/squashed/split an air line for the VNT control so triple check all those dinky little hoses on the pax side of the engine.

The big advantage of a Scangauge will be you can see the boost pressure so you can suss out whether boost is low or not.
They don't show EGT but unless you are chipping an engine or doing serious mods you don't need to know EGT anyway.

I would beg to differ on the egt gauge stock standard when I put a probe in my exhaust and towed my camper I was hitting 700 easily so fitting the egt to is the first thing to do before any mods by doing the mods all lower the egts.

[the evil twin]

I would beg to differ on the egt gauge stock standard when I put a probe in my exhaust and towed my camper I was hitting 700 easily so fitting the egt to is the first thing to do before any mods by doing the mods all lower the egts.

Hiya Kevin,

Every factory CRD towing Vans etc is probably doing the same temps, Cobber.

The CRD's run at pretty high dump EGT's out of the box.
Because of the large delta T across a Turbo, post Turbo EGT is only a 'guesstimate' to what the cylinder gas temps actually are.

[apalsson]

I was hitting 700 easily so fitting the egt to is the first thing to do before any mods by doing the mods all lower the egts.

OK, so if you are towing anything worth mentioning with a CRD, I assume you mean EGR block and wider exhaust?

[Hodge]

OK, so if you are towing anything worth mentioning with a CRD, I assume you mean EGR block and wider exhaust?

Highly recommended. EGR to stop the engine copping the heat twice, and exhaust to get rid of the heat quicker, in a nutshell.

[apalsson]

I spoke with a dealer for Redback yesterday - they wanted some $1,300 for a 3" system fitted.

[apalsson]

I have been playing with the new Scangauge. Most things seem pretty good but others I don't care for as much.
After I fitted it, I filled up with diesel (took 89 litres) and updating that was a pain and a half!
The other thing I cannot work out are the fuel consumption gauges. LHKM (litres pr 100Km) shows me using some 80L pr 100Km and AVG isn't much better.
I knew these cars are a bit on the thirsty side but this one really takes the cake
I chose DIESELa as the fuel type which I'm pretty sure is right.
Any ideas?

[Hodge]

I'm in the same boat with scangauge mate and fuel consumption. I think I didn't read the manual properly, as there is a process to follow for most accurate fuel consumption and mine is all over the place. They are apparently very accurate if you follow the proper process.