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.

Tags: technical issues

Similar questions

Need a new Key

John, I recently purchased a Volvo S80 T6 03 plate but it only came with one key. I approached a local store and Timpsons but neither could do it. My local (Nottingham) Volvo Dealership are asking £215.94...

Piping hot

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...

Will my car's infotainment system still work if I refuse the software update?

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?