FAQ : 155 : Find out what the colour of smoke from my Diesel (HDi) exhaust means - C4

FAQ

FAQ #155

	Find out what the colour of smoke from my Diesel (HDi) exhaust means
	You generally understand what is wrong with a diesel engine by the colour of smoke emitted from the exhaust. There are three basic colours - black, white and blue. Black Smoke This is due to a air to fuel ratio imbalance, either the fuel system is delivering too much fuel into the engine or there is not enough clean air (oxygen ) a few things to look for : * Faulty injectors (injectors need attention at about 100.000 to 120 000 miles) * Faulty injector pump * Dirty air cleaner * Turbocharger or intercooler faulty * Problems within cylinder head, valves clogged up due to faulty EGR (exhaust gas recycling unit) White Smoke Normally means that the fuel injected into the cylinder is not burning correctly. The smoke will burn your eyes. * Engine/pump timing out * Fuel starvation to the pump causing the pumps timing not to operate correctly * Low engine compression * Water/petrol in the fuel Blue Smoke The engine is burning engine oil * Worn cylinders or piston rings * Faulty valves or valve stem seals * Engine over full with engine oil * Faulty injector pump/lift pump allowing engine oil to be mixed with the diesel Source: United Diesel
Views	14194 (Unique 7917)
Member Rating :	8.1 - 9 votes
FAQ Posted by	Dave_Retired.
Info	Created: 11 August 2009 Last Updated: 01 February 2014

Random FAQ

How can I change the rear Brake Pads and Discs on a Citroen C4