why would there be black smoke coming from the exhaust constantly whilst accelerating? its a 1.9 cdti.
Apr 6, 2010 at 4:04 PM
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RASMATAZ
CERTIFIED EXPERT
75,992 POSTS
The air and fuel mixture is too rich
Probable causes of an engine running rich are as follows:
1.Fuel pressure not within specs.Can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Defective Oxygen Sensors.
3.Leaking injectors.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.