Abhishek_d_zulu Posted April 7, 2014 Share Posted April 7, 2014 Hi, I am having thick black smoke coming out do my 1998 Discovery 300 Tdi auto- not just at the start, but also when I pull- accelerating to overtake someone or going a bit uphill. Not to give some history on the vehicle- I had bought this a year & a half back- the engine had seized on it. I did a complete rebuilt for the engine- changed all ancillary parts, but retained the head (had it skimmed). I also replaced everything from the turbo, to radiator to you name it. The only additional part that I possibly didn't change is the fuel injection pump- though I had it serviced. Tried the engine oil with additives to clean the system, added additives to diesel etc- none seems to work. What am I missing? Need help... Quote Link to comment Share on other sites More sharing options...
reb78 Posted April 7, 2014 Share Posted April 7, 2014 Sounds like an intercooler hose has come off or has a split in it. Would be worth checking them. Quote Link to comment Share on other sites More sharing options...
Boydie Posted April 7, 2014 Share Posted April 7, 2014 it will only take one defective injector to produce black smoke under acceleration so have them checked out. Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted April 7, 2014 Share Posted April 7, 2014 Is the performance down at all? I also think as reb78 said check all hoses and remove them one by one and check them, I have see some hoses not split or pop off but separate from each other as they are double layered, and as the air is rushing past it it closes the pipe and starves the engine of air. Another place is if the pipes are ok check the turbo waste gate, it could be sticking or has become dislodged from the vacuume unit so it is permanent open dumping all the boost down the exhaust. Quote Link to comment Share on other sites More sharing options...
Abhishek_d_zulu Posted April 7, 2014 Author Share Posted April 7, 2014 Thanks- let me have these checked & report back. Hopefully it solves the problem... Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted April 7, 2014 Share Posted April 7, 2014 It might just be overfuelling and need the fuelling screw easing off Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted April 7, 2014 Share Posted April 7, 2014 It might just be overfuelling and need the fuelling screw easing off It'll have EDC, so sounds like theres not as much boost getting to the engine as the pump thinks. Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted April 8, 2014 Share Posted April 8, 2014 Ah, I missed the EDC bit Mass airflow sensor dirty or faulty Number 4 injector sensor feed Flywheel optic dirty De-laminated hose Blocked air filter EGR valve duff partially blocked intercooler Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted April 8, 2014 Share Posted April 8, 2014 Do 300 pumps have the same issue as the 200 had, in that they wear some internal components and then smoke badly? Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted April 8, 2014 Share Posted April 8, 2014 No,not any of the ones I ever saw. Usually the EDC is just as reliable as the mechanically governed VE pumps,however on the very rare occasion they do get into trouble everyone moans like hell about them .Usually because they have little or no experience in diagnosing them.The Bosch EDC fault codes are very accurate considering how early the design is - so unlike say P38 EAS codes they are worth taking note of. I would say its more likely an air restriction for black smoke,delaminated hoses or a sticking EGR valve would be worth checking out first before even looking at the EDC system.Over the years I have seen plenty of these go well beyond 200,000m without injection faults,my own work truck was on 207,000m when I sold it,the new owner is very happy with it. The EDC system must have saved plenty of engines too,as it cuts power output when the coolant temp goes too high,there have been plenty of cases of 300TDI's failing when the P gasket loses coolant on a long run,do the same with an EDC engine and it just slows right down.... Worth fixing - Yes,and the fault is probably something unrelated to the fuel system anyway. Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted April 8, 2014 Share Posted April 8, 2014 I've just had a fast and steep learning curve to EDC and I have to say, once the timing is set up properly it's great. It's so simple, yet clever. Economy is good too. Made me wonder why I've always avoided it before As for 200 Tdi pumps - I'm on my 7th 200Tdi over the last 21 years - not consecutive though. I did a quick tally of the mileage between the lot and it comes to a Nun's Cough over 1 million miles. I've yet to have pump wear issues - even on Siberian Diesel. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted April 8, 2014 Share Posted April 8, 2014 Do 300 pumps have the same issue as the 200 had, in that they wear some internal components and then smoke badly? Theres no difference between a 200 and a 300 pump. Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted April 9, 2014 Share Posted April 9, 2014 Why is the OP not responding? Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted April 9, 2014 Share Posted April 9, 2014 Probably shocked by all the replies - so much to wade through Quote Link to comment Share on other sites More sharing options...
jibbyman Posted April 9, 2014 Share Posted April 9, 2014 I thought the 300 tdi injector pump are 2 stage where the 200 tdi are single .These pumps are usually bullet proof so would go with hose collapse . Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted April 10, 2014 Share Posted April 10, 2014 No the pumps are identical. Quote Link to comment Share on other sites More sharing options...
Rangy35 Posted April 18, 2014 Share Posted April 18, 2014 I thought the 300 tdi injector pump are 2 stage where the 200 tdi are single .These pumps are usually bullet proof so would go with hose collapse . Yep identical pumps, you are thinking of the injectors. Quote Link to comment Share on other sites More sharing options...
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