Engine: D52447: - Black exhaust smoke from V50 2l diesel

twisted · Jul 8th, 2018, 21:15

I have a V50 on an 04 plate with 155000 miles on the clock. I have had the V50 for 10 years and have recently noticed black smoke coming from the exhaust especially under load (accelerating in high gear at relatively low speed and when towing a caravan). Because of the age of the car I was reluctant to use new parts (High cost) and so have replaced the Turbo, EGR valve and the injectors with warranted spare parts from recognised Volvo breakers. No improvement. I have just returned from visiting my daughter and travelled about 60 miles on open road and some urban roads. The computer tells me that I have averaged 46 mph and my fuel consumption is 58.2 mpg. which implies the engine is working well. Any ideas what I can look at next?

SwissXC90 · Jul 9th, 2018, 16:49

Check the entire intake system is free from leaks

Use a smoke tester

If the intake system has any air leaks, the air-fuel ration will be wrong resulting in over fuelling and black smoke

Chrisjuddxc90 · Jul 28th, 2018, 22:59

Could well be an intercooler leak/split, had a friend with the same issue

Jul 8th, 2018, 21:15	#1
twisted New Member Last Online: Jul 9th, 2018 20:11 Join Date: Dec 2011 Location: Lowestoft	Black exhaust smoke from V50 2l diesel I have a V50 on an 04 plate with 155000 miles on the clock. I have had the V50 for 10 years and have recently noticed black smoke coming from the exhaust especially under load (accelerating in high gear at relatively low speed and when towing a caravan). Because of the age of the car I was reluctant to use new parts (High cost) and so have replaced the Turbo, EGR valve and the injectors with warranted spare parts from recognised Volvo breakers. No improvement. I have just returned from visiting my daughter and travelled about 60 miles on open road and some urban roads. The computer tells me that I have averaged 46 mph and my fuel consumption is 58.2 mpg. which implies the engine is working well. Any ideas what I can look at next?

Jul 9th, 2018, 16:49	#2
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	Check the entire intake system is free from leaks Use a smoke tester If the intake system has any air leaks, the air-fuel ration will be wrong resulting in over fuelling and black smoke __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Jul 28th, 2018, 22:59	#3
Chrisjuddxc90 New Member Last Online: Dec 14th, 2019 12:05 Join Date: May 2018 Location: Salisbury	Could well be an intercooler leak/split, had a friend with the same issue

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