Question about 2005 Jaguar S-Type

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Black smoke from nearside exhaust, on occasions.

My 2004 S Type diesel sport, automatic on occasions, emiots black smoke from the nearside exhaust, accompanied by a lag in acceleration. What is the cause, and how much will it cost to remedy?...Mike Jones

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Black smoke indicates it is feeding too much fuel. Maybe problems with the fuel pump.

Posted on May 12, 2010

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1 Answer

Black smoke from exhaust but computor saying 44.5 mpg around town. 2.0ltr. mondeo deisel


Your duplicate question did not say it was a diesel.
Usually black smoke on a diesel is dirty injectors or the engine temp not reaching normal range.

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I have a x type jaguar 2003 black smoke when acelerating


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Jan 24, 2010 | 2004 Jaguar X-Type

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Renault megane diesel black smoke


This could be as simple as the EGR (exhaust gas recycling) valve stuck open. This valve is supposed to open at a specific time, recycling the exhaust gasses back through the engine. If they stick open, the engine is not getting the correct air mixture to burn the fuel efficently, causing black smoke and lack of power. Have the garage remove and blank off this valve. If it runs ok, then a new EGR is needed.

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Black smoke from exhaust


This is almost certainly a split hose - mine was the large hose coming out of the bottom of the EGR valve.

Speaking to a parts guy at my local Jaguar dealer, he said that the new part is uprated as Jaguar are aware that this is a problem.

The split allows more air in and results in the ECU changing the mixture and over fuelling - Black smoke is an indication of un-burnt Diesel. As well as the black smoke you may also notice a whistle/whine or sucking noise when you accelerate and a lack of power / lumpiness at around 2000rpm.

Hope that helps!

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Diesel fuel injection fault light keeps coming on , loss of power black smoke from exhaust.


Black smoke usually means a fuel problem, try changing the fuel filter and get an injector cleaner from tesco's or asda they're about £3 to£5, if your gonna change your fuel filter you might as well change the oil and filter and the air filter at the same time

May 22, 2008 | 2004 Renault Sportwagon

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