What do you think of Elon Musk? Have your say | No thanks
What's causing my Volvo S80 to emit black smoke?
I own a 2003 Volvo S80 D5, but the car has been emitting a lot of black smoke after warm up. I’ve replaced the pipes on the engine, swapped the EGR valve and checked both the manifold and injectors. So far I’ve spent £700 with a Volvo specialist and am no closer to fixing the car. Any ideas?
Asked on 22 August 2013 by John Bayley99
Answered by
Alan Ross
Well black smoke is due to the air to fuel ratio imbalance,either the fuel system is delivering to much fuel into the engine or there is not enough clean air (oxygen.
There could be many reasons for this:
1.Air filter blocked
2.Intake air system leaking/blocked
3.MAF ( mass air flow ) sensor
4 Turbo ( TC) boost pressure sensor-If fitted
5.TC wastegate
6.MAP ( Manifold absolute pressure ) sensor
7.IAT ( Intake Air Temp) sensor
8.ECT ( engine coolant temp ) sensor
9.Fuel rail Pressure ( sensor)
10.APP ( accelerator pedal position sensor)
As you can see rather a long list of things it could be.
You may want to ask the Volvo specialist, if they have checked any of the above for the £700.
There could be many reasons for this:
1.Air filter blocked
2.Intake air system leaking/blocked
3.MAF ( mass air flow ) sensor
4 Turbo ( TC) boost pressure sensor-If fitted
5.TC wastegate
6.MAP ( Manifold absolute pressure ) sensor
7.IAT ( Intake Air Temp) sensor
8.ECT ( engine coolant temp ) sensor
9.Fuel rail Pressure ( sensor)
10.APP ( accelerator pedal position sensor)
As you can see rather a long list of things it could be.
You may want to ask the Volvo specialist, if they have checked any of the above for the £700.
Tags:
technical issues
Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.
The Good Garage GuideSimilar questions
Please can you advise? My 1999T Volvo S80, bought new, now with 54,000 miles, developed a faulty lambda sensor. While removing it the Volvo dealer broke the collar in which it was attached to the exhaust...
I have been quoted a high fee for an infotainment software subscription on my Dacia Sandero. Will the system and reversing camera still work if I refuse the update?
My wife has the Toyota C-HR Hybrid and we have just returned from a long holiday (11 weeks) and the battery is flat. Would a solar charger be sufficient to keep the battery in good order? Does the C-HR...
Elsewhere on 
.jpg)
