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  KIA Sorento blowing smoke on cold start up 27 Jul 2013 (Ask HJ)
  My 2007 KIA Sorento 2.5 CRDI blows smoke on every cold start up. The problem usually clears as the car gets going, but it never happens when the engine...
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  Nissan X-Trail fuel problem - any ideas? 20 Jan 2013 (Ask HJ)
  When stood at idle after about a minute I believe it goes into get you home mode or just has no power, once I turn engine of and start it back up it runs...
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  Why is diesel more expensive than petrol? 2 Nov 2012 (Ask HJ)
  Could you explain why the cost of diesel fuel is up to 8p per litre more than petrol? As diesel is a lower fraction of the crude oil from which it is made...
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  High performance car, high performance fuel. 9 Feb 2012 (Ask HJ)
  I am purchasing an Audi S4 2005 model - will the car run on standard unleaded or should/must I use super unleaded or V-Power? If I have an option...
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  Eco-tuning 26 Apr 2011 (Ask HJ)
  I have received a flier for an ECU-remapping service claiming to improve fuel consumption by up to 20% - www.ecu-remapping-service.com. It is not cheap,...
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  Most economical estate car 3 Jan 2011 (Ask HJ)
  I am looking to purchase an estate car. It will be used as a business car and i'll be travelling about 250 miles a week. I need a bit of comfort, plenty...
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  Nissan Micra 1.0 Passion 9 Nov 2010 (Ask HJ)
  I own an 'R' Reg Nissan Micra 1.0 Passion which has recently started giving me a problem. It will start perfectly when cold but after about 15 minutes...
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  Waiting at lights in an automatic 9 May 2011 (Ask HJ)
  Should a Honda Jazz CVT be in neutral or drive when stopped at traffic lights. Which is better for the car and its fuel economy?
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  Under achiever 10 Jul 2010 (Ask HJ)
  We exchanged our SEAT Ibiza 1.9 diesel, which had given us trouble free service achieving and sometimes exceeding the mileage figures quoted by the manufacturer,...
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  Non starter 24 Jan 2009 (Ask HJ)
  Very recently I read a piece in your column about a car that "shut down" and simply wouldn’t start when the owner tried to move it within his drive. If...
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  Why has the fuel consumption in my car increased? 7 Mar 2024 (Ask HJ)
  After six weeks of my VW Passat standing idle I took it for its MoT, which since then has shown a marked reduction in fuel consumption. My wife's monthly...
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  Is my Honda Jazz Hybrid delivering the right fuel consumption? 22 Mar 2023 (Ask HJ)
  I bought my new Honda Jazz from a main dealer in 2022. The main reason I decided to change from my previous three-year-old year old Jazz was the expected...
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  How should we prepare our cars for winter hibernation? 5 Sep 2018 (Ask HJ)
  We have a couple of 1950s classic cars. At the onset of salted roads, in the past we filled the cars up with petrol, over inflated the tyres and kept the...
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  Back to the Landy 9 Oct 2011 (Ask HJ)
  Regarding the recent article about running older and much simpler vehicles that are perfectly adequate for everyday use, one glaring omission in the list...
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  I filled my diesel Jaguar XF with petrol - do I need to have the whole fuel system changed for £7,000? 28 May 2011 (Ask HJ)
  I filled my diesel Jaguar XF with unleaded fuel. I drove it 400 metres to my house with no problem. In the morning I had difficulty starting it. When it...
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  How did I get 63 litres of fuel into my Volkswagen Touran's 60-litre fuel tank? 3 Jun 2010 (Ask HJ)
  I have a query about the size of my fuel tank (Volkswagen Touran 1.9TdiS 07). I filled my car up with diesel yesterday, and my tank was already 1/4 full....
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  Unwarranted behaviour 3 Apr 2010 (Ask HJ)
  I have a 2005 Renault Grand Scenic 1.5 Diesel car that failed a year ago. The Renault Garage replaced the complete fuel injection system free of charge....
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  Tigra in his tank 12 Mar 2010 (Ask HJ)
  Driving home recently in my wife's 2009 Vauxhall Tigra 1.8 Exclusive, after a 40 mile round trip, we traversed a particularly nasty speed hump at 5mph...
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  Is my Venga's engine run in? 21 Aug 2013 (Ask HJ)
  I bought a brand new Kia Venga 1.4 ecodynamics petrol at the end of October 2012 and have driven just over 3500 miles, mostly short trips but including...
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  Which fuel additives can I use in my Audi TDi? 23 Feb 2013 (Ask HJ)
  When I looked up the Platinum Plus additive on Google it threw up several other additives also. All claimed to decrease fuel consumption, give smoother...