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  What could be causing my BMW 3 Series diesel to smoke under acceleration? 14 Sep 2013 (Ask HJ)
  I have a BMW 3 Series Touring diesel automatic bought from new in September 2006. I have had 50,000 miles of excellent trouble-free motoring and arrange...
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  Was my vehicle really serviced today? 19 Jun 2012 (Ask HJ)
  MacRae and Dick (Inverness) serviced our car today - or did they? Our 2011 Focus went for its first 12 months service today. When I lifted the bonnet...
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  Oil in water problem - how can I fix it? 21 Jul 2014 (Ask HJ)
  I have oil in my water coolant. I have a Renault Kangoo with a 1.5 diesel engine. The Kangoo is running perfectly, but oil is coming out the top of the...
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  Just a quick question for you on the Volkswagen emissions scandal... 23 Sep 2015 (Ask HJ)
  Just a quick question for you guys to chew on. This emissions scandal should also be subject to the other subsidiaries that they own including Skoda, Seat,...
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  Goes like a bomb 19 Jun 2010 (Ask HJ)
  In March 2009 I bought a used Jaguar XF, previously owned by Jaguar, Brown’s Lane, Coventry. On 31-12-2009 at 39,000 miles, it suffered catastrophic engine...
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  Why is my Ford Mondeo TDCI producing blue smoke? 30 Jul 2010 (Ask HJ)
  I have a 2.0-litre 2002 Ford Mondeo TDCI 130BHP and had a message saying 'P2339 Cylinder #4 above knock threshold' on the ECU diagnostics check. The car...
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  Black death 19 Dec 2009 (Ask HJ)
  Just over a year ago I bought a new (pre-reg) FIAT 500 1.25 diesel (I mean the type of fuel, not the confusingly ‘Diesel’ branded car). I used it as a...
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  Should we use diesel additive in our engine to keep it in good condition? 30 Mar 2013 (Ask HJ)
  We are focusing on news regarding fuel additives for use in diesel engines. With diesel cars now over 50 per cent market share in the UK, and very significant...
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  What is the cause of the knocking noise and black smoke when I drive? 19 May 2017 (Ask HJ)
  I have an unusual problem with my 1981 Toyota Hiace. In the six years that I've owned the car it has started burning sump oil and revving out of control...
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  Mercedes-Benz C220 CDI (W204) blowing black smoke 24 May 2014 (Ask HJ)
  I own a 2009 Mercedes-Benz C220 CDI (W204) with an automatic gearbox. I have recently had a problem where the car is blowing out black smoke and the car...
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  Fried turbo 29 May 2010 (Ask HJ)
  Apparently, BMW E46 2.0 litre turbo diesels are prone to turbo trouble. Could you kindly elaborate upon this by stating what these are, how they manifest...
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  Why is my Ford C-Max speckling my caravan with black spots? 23 Aug 2010 (Ask HJ)
  I have a Ford C-Max 2.0 TDCI Ghia on a 55 plate with the Euro IV engine. When we first had the car, when it was 18 months old, the car went in under warranty...
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  Why does my car keep kicking out lots of white smoke? 16 Sep 2018 (Ask HJ)
  My Vauxhall Vectra has started kicking out LOTS of white smoke. Then nothing for days and then smoke again. The water level is dropping slowly but performance...
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  Where's the best place to buy a used Ford Galaxy? 1 Oct 2016 (Ask HJ)
  Do you still recommend Addison Lee for buying a used Ford Galaxy? Just saw some negative comments on other websites. Is it worth getting a mechanic to...
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  Smokeless moan 19 Jun 2010 (Ask HJ)
  I own a 2002 Mercedes C220 CDI automatic, regularly maintained, still good to drive and still giving over 50mpg on motorways. Oil consumption is also very...
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  Do 'no smoke' treatments actually work? 1 Oct 2018 (Ask HJ)
  Can you advise me on Wynns Stop Smoke oil treatment or similar products. Do they actually work? I have a diesel and have been told it needs either a new...
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  Broken Peugeot 30 Oct 2011 (Ask HJ)
  I have a 99 t reg peugoet 806 1.9td, its burning oil and poor on diesel when you put your foot down clouds of black smoke pours out. The turbo feels like...
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  How are DPFs damaged by repeated short journeys? Our 2000 BMW 320d has done 180,000 miles without fault. 24 Dec 2010 (Ask HJ)
  Regarding latest EU emission regulations for diesel engines, could you please give us more information on the subject of the particulate filters being...
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  Our BMW 1 Series is showing a DPF light - is this because we only use it for short journeys? 20 Oct 2017 (Ask HJ)
  I recently bought my son a BMW 1 Series for his 18th birthday. Soon after the filter light came on. We took it to a garage to be looked at and the turbo...
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  What's causing my 2005 Ford Mondeo diesel to lose power? 21 Jul 2010 (Ask HJ)
  I own a Ford Mondeo Zetec 2005 TDCI (130). I have had the car for a year with no problems at all, until now. The car starts fine and runs ok in first,...