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  Supermarket diesel? 1 Aug 2011 (Ask HJ)
  I own a Toyota Corolla Verso 2.2 D4D. The Toyota dealer recommended that I not run the car on diesel purchased from supermarkets (do you agree with him?)....
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  Should I replace my diesel Qashqai with the petrol version to avoid DPF problems? 4 Jul 2011 (Ask HJ)
  I currently run a Nissan Qashqai 2.0-litre manual diesel. Long runs are now less frequent and I am considering changing to the petrol version to avoid...
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  Noisy tyres 17 May 2011 (Ask HJ)
  At speeds below 50mph I get a "rotational" noise, which I am told by Carr's of Bury St Edmunds is down to the run flats (It sounds like a wheel bearing...
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  Which automatic gearboxes are used by Addison Lee Ford Galaxies? 12 May 2011 (Ask HJ)
  I have had occasion to use Addison Lee mini cabs recently. They run a fleet of Ford Galaxys and the drivetrain seems to be particularly smooth. Do you...
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  What is causing my Volkswagen Polo 1.4 16v to hesitate and 'chug' under acceleration? 2 May 2011 (Ask HJ)
  I am experiencing issues with my Volkswagen Polo 1.4 16v, which manifest themselves as 'chugging' or hesitating. This initially started on acceleration...
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  DPF problem 14 Mar 2011 (Ask HJ)
  I have just been quoted £2300 to replace the DPF filter and EGR valve on my 2007 Fiat Multipla diesel. The car has done 10,000 miles in a year, the...
• Vauxhall Omega 2.6 V6 (51) - Vauxhall Omega 2.6 V6 suddenly running rough 3 Mar 2011 (Forum)
  Hi all, I have a Vauxhall Omega 2.6 V6 on a 51 plate and up until last week she was running very sweet. Then a few days ago she would start OK but there was a bit of uneveness in the idling, a bit of splutter even. This cleared though quite quickly after a few revs. Then it became
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  How do I clean my car's air conditioning system? 5 Sep 2010 (Ask HJ)
  I recall that you gave advice some time ago regarding 'fumigating' the air conditioning and ventilation system to get rid of noxious smells. I've tried...
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  Do I really need to have a fuel system clean every six months? 24 Aug 2010 (Ask HJ)
  Nissan have advised me that they recommend a fuel system clean every six months and will carry one out automatically when they service my car, unless I...
• Vauxhall Astra F - Overheating issue, running out of ideas 9 Aug 2010 (Forum)
  Hello all, The wife's Astra (1997, P reg) is overheating and we are stuck for solutions. Having been a cold running engine for all these years, 3 weeks ago out of the blue, just overheated and spat its coolant all over the engine bay.  Topped up coolant and it's not lost
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  Running free 17 Jul 2010 (Ask HJ)
  I have been offered a Freelander turbo diesel 5 door sport spec – 2004 reg with 19,000 miles on the clock at a cost of £7,000. Are you aware of any inherent...
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  Rhayader trap 17 Jul 2010 (Ask HJ)
  I own a Ford Focus 1.6 Automatic Reg 2009 on mobility. I have done approximately 2,000 miles but get only 33.3 mpg. This feels low to me. Dealer said...
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  Simmer down under 23 Jan 2010 (Ask HJ)
  When I was in Australia I borrowed a turbo-diesel people carrier. This had a device that could be set, if I remember correctly, to run the engine for 10-30...
• Vauxhall Corsa B (1993 - 2000) - 99 1.2 not injecting fuel into cylinder 21 Nov 2009 (Forum)
  am having sum trouble as i have changed the engine saw it running in scrapyard was ok.but its running lumpy and not started when hot??had ecu read maf sensor injector throtle and egr valve.replaced all these parts now with old engine and no better exactly the same.i no its not running rite because
• Renault - 03 2.2 Diesel Runs on own Oil 12 Nov 2009 (Forum)
  Q. I have just had a rather nasty surprise with my Espace 2.2 DCI. The Problem appears to be the engine running on ( ie screaming) its own oil. It ceased initially after a few seconds, then drove normally for approx 500 yards, to then happen again for a few moments then back to normal. Both
• Daytime running lights - opinion. 5 Nov 2009 (Forum)
  I see that in the HJ column of the DT there's a query about turning off daytime running lights on a Golf. In his reply HJ states that these "do not dazzle". I call cobblers on that. Driving into Brussels this AM, there was a light to medium mist. The number of VAG vehicles relying
• Toyota Yaris (1999 - 2005) - 99 1.0 P0172 - Mixture too rich 21 Jul 2009 (Forum)
  returned a little more regular. Up until about 4 months ago it would return after about 4 or 5 months but now appears within 2/3 weeks. Although the fault doesn't affect the cars running I will be looking at selling soon and do not want to sell with this fault still present. I remoed and cleaned the MAF
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  Running on empty 6 Jun 2009 (Ask HJ)
  A few weeks ago you published a letter from a reader that gave details of a company that could supply runflat tyres for his BMW at less cost than a BMW...
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  Gas trick influencer 4 Apr 2009 (Ask HJ)
  Many adverts for LPG converted Range Rovers claim that vehicles so converted, will be TfL congestion charge exempt, yet a conversation with someone from...
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  Vol no vo 28 Mar 2009 (Ask HJ)
  I own a year 2000 Volvo V70 Estate, and am having trouble starting. Sometimes the engine will fire and run for about two seconds and then cut out as though...