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  It's almost impossible to get fuel into our newly bought used car - what's the problem? 4 Aug 2017 (Ask HJ)
  My daughter just bought a 2006 Ford Focus 1.8 TDCi from a used car trader. It's only possible to put a trickle of diesel in or else the nozzle cuts out....
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  Recommissioning a Mk1 Golf Cabrio 10 May 2016 (Ask HJ)
  I own a Mk1 Volkswagen Golf convertible which was last started 16 years ago! It has been kept in a garage since then. Apart from buying a new battery and...
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  Superfuels 26 Jan 2016 (Ask HJ)
  You have advised using high octane fuel such as Shell V Power Nitro. However motoring writer Laura Thomson has advised that although premium grade fuel...
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  Mystery petrol leak 5 Jun 2014 (Ask HJ)
  My low mileage 1998 Mercedes-Benz SLK is only used in the summer and is always kept garaged. However, recently I have noticed a small petrol leak with...
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  Fuel Economy of post-2008 cars 11 Jan 2013 (Ask HJ)
  You mention in the current stats that newer cars fair worse on fuel economy compared to official figures - do you have the average drop for newer models...
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  Is it okay to use fuel additives? 21 Nov 2012 (Ask HJ)
  Over the years I've used Miller's Diesel Plus in our diesel cars, mainly to lubricate the injector pump rather than seeking extra performance. We have...
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  Which small car offers better fuel economy than the 1.6-litre Golf? 3 Oct 2012 (Ask HJ)
  My mother recently had her reliable old Ford Fiesta written off after a car hit her. She has replaced it with an S-reg 1.6 Volkswagen Golf, but is only...
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  Is it worth using a diesel additive in my Volkswagen Passat? 6 Sep 2012 (Ask HJ)
  I drive a 2007 Volkswagen Passat 2.0TDi 140 SE saloon. Could you please advise me if using Millers Diesel Power ECO MAX fuel additive is worth the expense?...
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  Real fuel economy of the 2011 Focus? 18 Jul 2012 (Ask HJ)
  I really like the look of the 2011 Focus, it gets excellent reviews in most motoring journals. So why is the real fuel consumption from your register,...
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  BMW 1 Series won't start 13 Jul 2012 (Ask HJ)
  My 1 Series engine fires but then resorts to a chugging sound and does not fire up properly. No computer data problems on dash board, fuel all good. Car...
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  Why doesn't my warranty cover fuel tank breather fault? 16 Jun 2012 (Ask HJ)
  I purchased an extended warranty when I bought a 2008 SEAT Ibiza Ecomotiv from a dealer. The breather to the fuel tank is leaking, and I am told this is...
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  Ford Fiesta 'Engine System Fault' 13 Mar 2012 (Ask HJ)
  Frequently at 70mph the 'Engine System Fault' message appears and the car, 2008 Fiesta TDCI goes into Limp Home Mode. Ford plugged it in and said that...
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  Mazda 5 Diesel; 2007 Reg started using oil and poor fuel consumption 28 Dec 2011 (Ask HJ)
  Just passed 51k miles and now using oil at a guess of about 1 litre/500 miles. Poor fuel consumption - and when in second gear (as in going around a corner,...
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  code po191 20 Jun 2011 (Ask HJ)
  Problem with high fuel pressure shutting my Citroen Relay van down while driving. I've changed high pressure pump, regulator, in tank pump, rail sensor,...
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  EEC Diesel Tax 12 Apr 2011 (Ask HJ)
  Read that EEC are proposing to base fuel tax on energy content rather than volume and to have separate taxes for carbon dioxide and fuel. This could...
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  Our Vauxhall Zafira won't start if left for a few weeks - any ideas? 15 Aug 2010 (Ask HJ)
  If my W-reg Vauxhall Zafira is not used for several weeks it is extremely hard to start. We have had a non-return value fitted in the fuel line as the...
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  Can premium fuel prevent a DPF from clogging up? 29 May 2020 (Ask HJ)
  I have read that buying premium diesel will help prevent the DPF from blocking up as it has additives in it. Is this true or am I wasting my money?
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  Where can I get test specs for a specific Delphi fuel injection pump? 29 Aug 2010 (Ask HJ)
  I desperately need the test specs and timing information for the Delphi diesel fuel injection pump model #9320A224G. I know I can get this when I purchase...
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  Is it worth using premium grade petrol? 26 Feb 2018 (Ask HJ)
  Is premium grade petrol good value?
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  Can you recommend a car with good fuel economy on a budget of £6000? 9 Mar 2017 (Ask HJ)
  I do approximately 20,000 miles per year, of which the majority is motorway driving. Can you recommend a car with good fuel economy on a budget of £6000?