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  Fuel delivery problem with BMW 3 Series 30 Sep 2014 (Ask HJ)
  My BMW 3 Series E46 is running poorly, The engine appears to be uneven in its power delivery and feels like the diesel isn't getting through. Any ideas?...
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  Hyundai i30 - are there any known problems? 2 Feb 2014 (Ask HJ)
  Are there any known problems with a CRDI system as on the Hyundai i30? The fuel pressure is quoted as up to 30,000RPM and this seems incredibly high for...
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  Premium fuel worth the extra? 11 Sep 2012 (Ask HJ)
  My six year old Ford Focus only just passed the MOT emissions test, and I have been advised to use super unleaded petrol to keep the engine clean, is this...
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  TVR hot start issues 12 Apr 2011 (Ask HJ)
  Our 1997 TVR Chimera wont start immediately after stopping when hot (i.e stopping for petrol!!!) It will eventually but only after cooling down. Is that...
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  P0087 & P0088 fault codes - what do they mean? 21 Feb 2016 (Ask HJ)
  I own a Ford S-MAX (2008 model) 2.2 diesel. Recently it has displayed some fault codes. P0087 and P0088 both coming on at the same time. The car drives...
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  Can I reject a car due to poor fuel economy? 3 Aug 2014 (Ask HJ)
  I bought a 2008 Lexus IS220d recently from an independent dealer. When I bought the car the salesman told me it would return 40+mpg. However, the car hasn't...
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  Fiesta 1,4TD Hard Ride ? plus fuel tank ? 28 Apr 2013 (Ask HJ)
  I'm unhappy with the harsh, hard ride on standard fit 195/50/R15 tyres on my new Fiesta. The hand book very inexplicit regarding the tyre pressures, too....
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  Car damaged due to contaminated fuel - who's to blame? 21 Oct 2013 (Ask HJ)
  I purchased a two year old 19,000 mile car from a large car supermarket three weeks ago. I collected the car and drove it the 50 miles to my home. Within...
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  I put 7.5 litres of petrol in my diesel car and then drove 20 miles - will I have future issues with the car? 16 Mar 2020 (Ask HJ)
  Last night I accidentally put 7.5 litres of petrol into my diesel car. It was late at night and everything was closed because of the coronavirus. I filled...
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  Is Shell fuel really that much better than supermarket fuel? 9 Apr 2018 (Ask HJ)
  I've always used Shell V Plus diesel in my Range Rover TDV8, with 160,000 miles on it. My neighbour said it was a waste of money, so I switched to Asda...
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  Why does my Ford Mondeo stall in cold weather? 25 Nov 2014 (Ask HJ)
  I have a repetitive problem with my 2002 Ford Mondeo 2.0 TDCi - the car stalls in cold weather It only happens for the first few hundred metres and...
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  Which company car for motorway driving with good fuel economy and low tax? 1 Jul 2012 (Ask HJ)
  I am shortly to change jobs and will have to choose a company car, list price up to £28,000. I am 6-feet 4-inches tall, will drive approximately 60,000...
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  Excessive fuel consumption on a Focus 1 Jan 2012 (Ask HJ)
  Earlier this year my fuel consumption reduced by about 5 to 10%, I check the consumption weekly and do the same journeys each week. I changed the air...
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  Diesel Fuel Quality 22 Nov 2011 (Ask HJ)
  Following your advice I usually use Shell Diesel (I know you recommend some other varieties), I pass on this advice to others. However I usually get a...
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  Coast to Coast 9 Oct 2011 (Ask HJ)
  The article by Kara Gammell in the Money Supplement in a recent Sunday Telegraph stated towards the end:- "But don't think that freewheeling down a hill...
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  Do premium fuels de-coke turbochargers as well as injection components? 9 Sep 2010 (Ask HJ)
  This is a very important question as many vehicle owners suffer sticking vanes in turbochargers due to carbon build-up, which is very expensive to fix....
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  Which cars can use super ethanol (E85) fuel? 2 Aug 2022 (Ask HJ)
  There is an increase at the pumps in France of super ethanol. Which UK purchased cars can use it?
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  Air conditioning and fuel consumption 24 Feb 2014 (Ask HJ)
  Your recommendation is to use air con regularly to avoid dry seals but my car manual recommends leaving air con on to enable the climate control system...
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  Fuel consumption worse after using premium fuel. 1 Jul 2012 (Ask HJ)
  A few months back I persuaded my wife that it was good practice and worthwhile to fill the Nissan X-Trail with higher quality diesel, as although it was...
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  Diesel injector problems with a Peugeot Expert 14 Mar 2012 (Ask HJ)
  I recently changed the fuel filter on my Peugeot Expert 1.9[non turbo] 03 van. It has a lucas injector pump and the filter housing has the zip tie type...