Black smoke on acceleration

[b.williams5]

My 2002 V70 D5 SE Auto with 145k miles suffers from black exhaust smoke when accelerating after cruising. The problem has existed from new and the dealer fitted two complete sets of replacement injectors in the first 18 months, but the problem always swiftly returned. Once the black smoke is blasted away, the exhaust is clear until the next spell of cruising. It doesn't smoke when cold. Any ideas? With winter nights coming, I am embarrassed by the effect on following traffic.

[NI_Volvo_Nut]

After how long a spell of crusing? Diesles need revved out regularly, if its after 10 -20 miles crusing i'd be concerned, if its after 200 miles i wouldnt be, that said, black smoke = unburnt fuel, maybe a ecu remap? blocked fuel filters + air filters would cause the same problems too

[S60-MBS]

Split intercooler or intake hose will also cause black smoke. a D5 will smoke on heavy accelaration when there is a air leak in system

[Peter Milnes]

On older types black smoke can be attributed to injectors. Mine have to be checked/serviced at 60,000 miles and replaced at 120,000 miles. The seatings on the electrically operated injectors in your car may be starting to leak a little so check the tightness of attaching bolt(s) and security of tubing to ECU.

All the best, Peter. :car-smiley-031:

[b.williams5]

Thanks for the advice. Bearing in mind that it has been with the car since new, it seems probable that there is an air leak. I will get my local garage to inspect and rectify. Volvo in Maidstone have never suggested this cause, which is worrying.

[Clan]

If you have never had the intercooler replaced , It's odds on that this is split causing your problem ...

[George K]

Mine has done 110,000 miles andc smokes under heavy acceleration, even though i do very little town driving. Could it be tired injectors (performance and fuel consumption seem OK) or worn turbo - excess clearance limiting maximum boost and thus over-fuelling?

[cleethorpes]

Check the tray under the condensor/radiator/intercooler to see if its got a puddle of oil, my intercooler has just given up and a nice puddle of oil welcomed me this morning (the tray fills up while your driving then drips through the drain holes when you park up....good times!

[palwing]

My 52 plate D5 V70 Auto had the same black smoke problem. Turned out to be a split intercooler radiator problem. About 80k on the clock. Local Volvo specialist reckons it's a common problem. Fuel consumption was poor too. Repair was around £350 ish. Should feel the air escaping from the split when the engine is rev'd up. Might hear a whistle (outside) too.

Car has now done 99500 miles and it looks like it now has the dreaded Injector problem with poor starting.

However, fantastic car, brilliant comfort, fuel consumption, ride and great engine..so I will be keeping the car....for now.

[Clan]

Possibly an injector , but each is available separatly now , no need to change all 5 you may have one or two faulty but not all of them ...

[palwing]

Futher to my injector problem..here are the details. However, there's no black smoke at the moment.

52 plate V70 D5 auto - 99500 miles..cold start problem this AM for the first time. After about 3 mins of cranking, it started. Outside air temp around 7'C after a chilly night. Heater coil light worked as normal.

Volvo dealer quoted £250/injector plus labour.

So, taken the car to a local Volvo specialist. No fault codes showing, mechanics reckon it's an injector problem. They have quoted me £30/injector to have them checked + 1 hour labour (£52 +vat) to get them out and in. They can get any faulty injectors refurbished for £125 each with 1 yr guarantee. That sounds cheaper than Volvo!

Car is at the garage now. Should know more in the next few days. Will keep you posted.

If this works, I will give people the garage details for those that are interested. They have done work for me before and are very good. Garage is in Norfolk.

[palwing]

Car is running sweet since the injector (x5) refurbishment and starts 1st turn even at sub zero temps. However, before the Injector problem, the computer was showing over 42mpg, but now it's showing 37.5mpg. Same sort of journeys.

Recently, I reset the computer before a long motorway run from Cornwall to Norfolk and filled the tank up to the brim. The computer showed 43.3mpg on arrival in Norfolk and I was cruising at err..cough...motorway speeds all the way. Exeter to Norwich via M5/M4/M25/M11/A11 in under 5 hrs..and I mean well under. The fuel guage was at 1/2 tank after 340 miles and the light came on after 540 miles.

However, since then the MPG shows 37.5mpg now with mixed Norfolk driving.

The car has just been serviced and they can't find any probs on the diagnostics but have replaced the fuel filter and checked the brakes, etc. New tyres have just been fitted and running at 36psi (225/45/17) Feels a little hard but I have a full boot area most of the time.

I am putting the increased fuel consumption down to the near freezing temps at the moment.

[Chris Parish]

Possibly an injector , but each is available separatly now , no need to change all 5 you may have one or two faulty but not all of them ...

I am very interested to hear this Clan.

Please tell me where I buy them individually as my S80 D5 is occasionally starting badly now.

Regards
Chris

[Clan]

Your volvo dealer sells them individualy you will need the number from the top 1, 2 or 3 grade and tell them which cylinder and you get the pipe with it .

[palwing]

I am very interested to hear this Clan.

Please tell me where I buy them individually as my S80 D5 is occasionally starting badly now.

Regards
Chris

Hi

I believe you can buy them individually from Volvo nowadays. Or, just get the unserviceable ones refurbished for less. However, my reason for changing all 5 is that my guess is one of the others was likey to go wrong in the near future too and I need a reliable car.

[ahal]

I've heard of the same problem with the Mercedes 200 series ... a diesel recirculation valve if I recall correctly... meant to send the vapours through for a second burn. Don't know if it's the cause of your problem, just thought I'd throw it in.

Good luck,

Tony.

[Bhavik]

Hello..

I have volvo XC60 - D4 2013 model.
In my vehicle there is issue of black smoke from exhaust while acceleration and for this concern i replaced particulate filter but problem did not resolved so then i found small leak in inter cooler so i replaced inter cooler and taken road test but did not made any change after that checked turbo charger and it was perfect and also there is not any leak in intake system and also performance of engine is perfect.


Before some time i replaced fuel common rail and HP pump for other issue.

Please help me in this concern.

Regards.

[davebb]

Hi is the MAF reading as it should, if it is reading to high it will inject more fuel,
Dave

[Bhavik]

I had checked and found EGR valve is leak during idle. Cannot be reason for smoke while acceleration ?:omg_smile: