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  Fuel economy 4 Aug 2012 (Ask HJ)
  I have recently signed up to a 4year lease deal on a Fiat 500 Twin-air (2012 ) and have had the car for 3 weeks. I understand that the car has only completed...
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  Gastric ring 23 Jun 2011 (Ask HJ)
  I have recently purchased, for a bargain price, a Ford F350 American pick-up truck. It has a 7.3 litre turbocharged diesel engine. I use the truck for...
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  What is more fuel effcient - towing or hauling? 5 Jun 2023 (Ask HJ)
  What's the most fuel efficient way to move two tonnes of cargo, a light truck like a Daily or Sprinter or a trailer behind a Toyota Hilux or Isuzu D-Max?...
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  Should I change the fuel filter on my Volkswagen Lupo GTI? 1 Oct 2018 (Ask HJ)
  I recently bought a 16 year old Volkswagen Lupo GTI with a full service history. There's no record of a change of fuel filter - not even in the Volkswagen...
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  How can I refill a modern car with fuel can? 13 Jun 2014 (Ask HJ)
  I have always carried a reserve supply five-litre can of diesel on journeys in the remoter parts of the Scottish Highlands and Islands where there are...
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  Is my car’s MPG reading correct? 8 Sep 2013 (Ask HJ)
  Can you tell me if the average fuel consumption figure displayed by my car's on-board computer is correct? I’ve read a lot of reports that claim official...
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  Diesel engine clogged up after running out of fuel - how can I fix it? 18 Jul 2013 (Ask HJ)
  I ran out of diesel recently in my Ford Mondeo. I added more fuel, but the car keeps spluttering to a halt. I’ve put injection cleaner in and changed the...
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  Diesel engine fuel flush - was it necessary? 14 Feb 2012 (Ask HJ)
  My wife's Clio Extreme dCi 86 had its first MOT today, and the garage, without our authority, carried out a fuel flush on it, charging us £20. This they...
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  Stuttering Volkswagen T4 23 Mar 2011 (Ask HJ)
  I've been to Volkswagen garages, I've been to Volkswagen nuts, but I still can't find out why my T4 (1991 2litre petrol manual) stutters when in fifth...
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  Where's the fuel filter on my Nissan Almera? 6 Sep 2010 (Ask HJ)
  Please tell me where and what the fuel filter looks like for a new shape (2000) Nissan Almera 2000. I can see where three rubber tubes go to leading from...
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  Replacing the coil pack in my 2007 BMW 1 Series gave better fuel economy. 18 Jun 2010 (Ask HJ)
  I thought you may like to know of some problems with my BMW 120i M Sport 07/57. About 12 months ago the "stop/start" feature stopped working due to a faulty...
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  How can I improve my Hyundai Accent's fuel economy? 9 Jul 2010 (Ask HJ)
  How can I improve the fuel economy of my Hyundai Accent 1.3? Are there any special products like air filters, plugs and leads which can help?
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  Fuel pump has no pressure? 16 Feb 2013 (Ask HJ)
  There's no presure coming out of the high pressure pump from the engine. Can you think of any reason this might happen please John?
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  Fuel additives? 26 Jun 2012 (Ask HJ)
  There is no Shell filling station locally so I use BP 'Ultimate' - but here it is 10p/litre dearer than'Regular' unleaded. Is there an additive that I...
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  Why did my 2002 Peugeot Partner cut out? 19 Jul 2010 (Ask HJ)
  My 2002 1.9d Peugeot Partner just cut out on the road and will not start. There's no fuel reaching the injectors.
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  Can I modify my car to save fuel? 15 Jan 2024 (Ask HJ)
  A local company says it can adjust the fuel use of my Citroen C5 6 spd, 2.0 HDi, upping it 10% without risking any parts. I'm a slowish driver, mostly...
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  My car has been sat for six years with some diesel in the tank - should I drain it before starting it? 10 Apr 2019 (Ask HJ)
  I have had a 2003 Mercedes-Benz E320 CDI sitting on the drive for the last six years with some diesel fuel in the tank. Now I am about to restart using...
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  Fuel pressure issues 3 Sep 2014 (Ask HJ)
  I have read about a possible issue with the Ford C-Max and the fuel filter becoming easily blocked with emulsion, which forces the car to go into limp...
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  Why does the engine cut out on my Astra? 13 Aug 2014 (Ask HJ)
  My 1998 Vauxhall Astra keeps cutting out. After stalling I can hear the fuel pump running. Wen switching the ignition off and then on again, the fuel pump...
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  BMW 320d - what's the best fuel and tyre combination? 7 Feb 2014 (Ask HJ)
  After reading your glowing report of the BMW 320d ED, I have bought a one year old model. Do you think it is worthwhile using a premium fuel such as Shell's...