Black Smoke Revisited
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Senior Member
Joined: Aug 2012
Posts: 902
From: Bolton, UK
Black Smoke Revisited
Since I retired, I don't do a lot of mileage in my Voyager, mainly short trips around town with the occasional 100 mile motorway journey.
Going back to last winter, each time I started my 2.8 CRD I could see a bit of black smoke from the exhaust. This would disappear when the engine warmed up a bit. I've not experienced the smoking during the warm weather.
However, last week I returned home from a 4 week trip to Spain and France during which time I travelled 3k of mainly motorway miles. No problems with the car during the trip but since arriving home I see thick clouds of black smoke whenever I accelerate hard.
I have ordered a new fuel filter and a can of BG244 which I'm hoping will at least improve the problem. I've seen a few posts which recommend pouring the BG244 directly into the filter but do I fill the filter with it or just a few drops and put the rest in the tank?
Going back to last winter, each time I started my 2.8 CRD I could see a bit of black smoke from the exhaust. This would disappear when the engine warmed up a bit. I've not experienced the smoking during the warm weather.
However, last week I returned home from a 4 week trip to Spain and France during which time I travelled 3k of mainly motorway miles. No problems with the car during the trip but since arriving home I see thick clouds of black smoke whenever I accelerate hard.
I have ordered a new fuel filter and a can of BG244 which I'm hoping will at least improve the problem. I've seen a few posts which recommend pouring the BG244 directly into the filter but do I fill the filter with it or just a few drops and put the rest in the tank?
Senior Member
Joined: Jul 2013
Posts: 885
Pro. mechanics usually put an injector cleaner in the fuel filter. Whether this works or not depends on what is contaminating the injector(s) or disturbing them. If the injector is "coked" with carbon, there is nothing known to man that will dissolve it. Sometimes it can be burned off with a high-rev run.
It's well possible your injectors may need reconditioning. They replace the pintle which is most likely to be worn, then test in air to see if the output looks like misty smoke with no dribbles of neat diesel. Some injectors are calibrated to a partic. cylinder, so it's best to see the recon. injectors go back in their own cylinders.
If you have been abroad, it's possible your tank has some less than cetane #51* diesel in it, although if only in Europe, this should not be so.
Drivers who keep a hawkeye on diesel fuel consumption can tell immediate if an injector is "off" as the fuel consumption rises noticeably usually without black smoke.
Leedsman.
* The cetane number refers to the burning speed of diesel. The higher the number the faster. It is the opposite of octane number for petrol, where the higher the number the slower the burn. In Europe/UK there is no point in using diesel with a higher cetane number than 51 as all euro engines are designed and controlled for this number.
It's well possible your injectors may need reconditioning. They replace the pintle which is most likely to be worn, then test in air to see if the output looks like misty smoke with no dribbles of neat diesel. Some injectors are calibrated to a partic. cylinder, so it's best to see the recon. injectors go back in their own cylinders.
If you have been abroad, it's possible your tank has some less than cetane #51* diesel in it, although if only in Europe, this should not be so.
Drivers who keep a hawkeye on diesel fuel consumption can tell immediate if an injector is "off" as the fuel consumption rises noticeably usually without black smoke.
Leedsman.
* The cetane number refers to the burning speed of diesel. The higher the number the faster. It is the opposite of octane number for petrol, where the higher the number the slower the burn. In Europe/UK there is no point in using diesel with a higher cetane number than 51 as all euro engines are designed and controlled for this number.
Last edited by Leedsman; Sep 25, 2014 at 06:43 AM.
Senior Member
Joined: Apr 2013
Posts: 390
From: Wales...
BG244 is far better than forte stuff! Look at the amount of PAO in the both of them to see thay BG244 has alot more! I will try and find discount codes for folks who wanna use the stuff! The reason why mechanics usually pour it into the filter is to try and blast it through for an MOT test! Best way is to stick it in the fuel tank! Thats the reason why the manufacturer of the stuff doesn't tell you to stick it in the fuel filter! There is a reason...
