D1 300 Tdi Black Smoke, Help please.

Davee · Apr 25, 2013

Guys,

I have an overfuelling problem with the car, I've tried a few things that have previously been suggested on this site, need to know if im on the right track on where to go next. So any help appreciated.

Discovery 1. 300 Tdi automatic, with EDC.

It's pumping clouds of black smoke out as soon as you touch the throttle, loss of power (cos I cant accelerate anyway!), and a possible misfire, which could be cos it's rich anyway.

So far I have done the following;
Changed Air Filter
Changed Fuel Filter
Changed Intercooler hoses.
Cleaned Intercooler.
Cleaned Cyclonic Breather.
Cleaned Air intake.
Replaced Cat downpipe with straight thru' pipe.
Swapped turbo with one of unknown ability, but supposed to be a good one.

End result, problem is still there.

So, i'm thinking it's got to be either a faulty pump, or the pump timing?
Could the timing belt have slipped? it's been on there for 30,000.

Thanks for any assistance.

beerdude · Apr 25, 2013

EGR valve?

jamesmartin · Apr 25, 2013

Davee said:
Guys,

I have an overfuelling problem with the car, I've tried a few things that have previously been suggested on this site, need to know if im on the right track on where to go next. So any help appreciated.

Discovery 1. 300 Tdi automatic, with EDC.

It's pumping clouds of black smoke out as soon as you touch the throttle, loss of power (cos I cant accelerate anyway!), and a possible misfire, which could be cos it's rich anyway.

So far I have done the following;
Changed Air Filter
Changed Fuel Filter
Changed Intercooler hoses.
Cleaned Intercooler.
Cleaned Cyclonic Breather.
Cleaned Air intake.
Replaced Cat downpipe with straight thru' pipe.
Swapped turbo with one of unknown ability, but supposed to be a good one.

End result, problem is still there.

So, i'm thinking it's got to be either a faulty pump, or the pump timing?
Could the timing belt have slipped? it's been on there for 30,000.

Thanks for any assistance.

doubt its pump or timing ,it is poorly burnt fuel through not enough air or poor injectors etc

Davee · Apr 25, 2013

Thanks for the replies guys.

The Egr is blanked off, sorry left that one off the list.
And I've also cleaned the Air Metering Unit.

Would a single injector cause so much smoke and problems?
There was a bit of haze behind the motor that I could see on one day, then a bit more obvious black smoke the next day on acceleration, now it's a black cloud.

Sorry, I've not had a faulty injector before, other than the #4 one with a faulty sensor, but that was a misfire problem no smoke, so I don't know what to expect to see.

Mark151151 · Apr 25, 2013

I had a p38 2.5dse. The timing chain stretched in it causing the pump timing to be off and it had a crazy amount of thick black smoke coming out it. I would be checking your pump timing first. Then for a leaking or failed injector if the pumps set properly.

MPfive · Apr 26, 2013

Im going to sound knobish and probly off the mark with this,but when did you change the oil last. Last couple of discos I've had smoked bad when I left the service to long.

Davee · Apr 26, 2013

Thanks guys.
The oil & filter gets changed regularly with AllMakes and a semi synthetic. Last done about 800 miles ago.
D1 service kits are about the only thing that are cheap......

I'm hoping that it's going to be a dodgy injector but i dont have any spare ones to hand, so it'll have to wait for the moment. The best I can do at the moment is get the timing checked, at least rule another thing out anyway.

Cheers.

MPfive · Apr 26, 2013

Fair play,good luck. Nothing worse than having it off the road

D1 300 Tdi Black Smoke, Help please.

Davee

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beerdude

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jamesmartin

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Davee

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Mark151151

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MPfive

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Davee

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MPfive

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