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  Selling a car with the DPF removed 24 Jun 2014 (Ask HJ)
  I've had the DPF removed from my diesel car and had the required ECU remapping done about 18 months ago. It's been fine since then with no more going in...
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  Why are my 2006 Volkswagen Golf's windows opening on their own? 7 Sep 2013 (Ask HJ)
  I have a 2006 Volkswagen Golf Plus TDI. When in Harrogate last Thursday the car was parked on the street. At about 11:00pm the hotel manager called me...
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  No need to 'simmer' a modern turbo after a long run? 14 May 2013 (Ask HJ)
  I am the driver of a new Audi A6 diesel, which has stop-start. I was concerned about an abrupt engine stop after a long or hard drive, and emailed Audi...
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  Dashboard information vanished on my Scenic 7 Apr 2013 (Ask HJ)
  My wife's 54 plate Renault Scenic with nearly 90 thousand miles on the clock (or was!) has suddenly lost all information on the dashboard - speedometer,...
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  Citroen Berlingo losing power 26 Nov 2012 (Ask HJ)
  I have a Citroen Berlingo 1.9-litre diesel van (with the XUD engine), and have recently found that it's lacking power. I've had the fuel injector pump...
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  Warning light after failed emission test - should I worry? 27 Sep 2012 (Ask HJ)
  My 3 Series had its MOT today and showed a problem with the emissions test. 1st fast idle test it failed with twice the limit. The car display showed engine...
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  Winding down 9 Aug 2011 (Ask HJ)
  Have you received any reports of Skoda Octavia windows opening for no apparent reason? I left my 59 reg car in front of my garage, fully locked. When I...
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  Did you know that short journeys are bad for the environment as well as for your car? 10 Feb 2011 (Ask HJ)
  Regarding your comments about short runs by IC-engined vehicles, (and engines in general), you're absolutely right. Short (cold) runs are bad for the engine,...
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  Question in respect of DPFs in new Freelander 2 11 Jan 2011 (Ask HJ)
  I have read your general advice. Can you advise how the regeneration of the DPF in a Freelander 2 works? Does it regenerate anyway when one goes on...
• Peugeot 306 HDi 2.0 (2000) - 306 HDi...possibly a dumb question 9 Dec 2010 (Forum)
  out of fuel but runs constantly once the engine has started So rather than finding the fault thats stopping power from getting to the LP pump which icould be the pump relay, the connector, the wiring itself an ECU output or maybe even the emergency fuel cut off solenoid (its a diesel so
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  A gentleman and a Skoda 19 Sep 2010 (Ask HJ)
  I just found your VW ABS report online. Having been to the local Skoda Dealership with my 3 year old Octavia, which has been serviced at that dealership...
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  What can I do to repair my Ford Escort GTI which keeps losing power? 30 Aug 2010 (Ask HJ)
  My 1997 Escort GTI keeps losing power. When I start it up it idles fine, but when I press the accelerator it chugs and splutters when it is cold. Took...
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  My Peugeot 205 GTi won't start - any tips? 22 Aug 2010 (Ask HJ)
  I have a Peugeot 205 GTi. It's been sat for three weeks and ran spot on before I parked it up. When I tried to start the car the battery was flat, so I...
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  Should Audi fully cover the replacement of the ABS pump in my A3? 7 Aug 2010 (Ask HJ)
  The ESP light on my Audi A3 is permanently illuminated. From the fault code I believe it is the much-maligned problem with the ABS pump, which I was completely...
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  Why is my Jaguar XJ Super 8 automatic's gearbox 'thumping' when changing gear? 4 Jul 2010 (Ask HJ)
  My 2003 Jaguar XJ Super 8 automatic has recently been making an occasional, mild, gearbox "thump" when changing up from first to second gear, together...
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  DSGd of Plymouth writes 20 Mar 2010 (Ask HJ)
  I bought a new VW Golf plus 1.9SE TDI and was persuaded to have the car with a DSG automatic gearbox after reading the Golf brochure that stated "the DSG...
• Volkswagen Golf III (1992 - 1997) - 97 1.6 car does not start in the wet... 2 Dec 2009 (Forum)
  of the mind that the ECU relay may be at fault having scrolled thru' annuls of forums but a) where is the ECU relay - unable to locate near fuse box under dashboard on o/s and b) are there any other faults that could be occurring? Fuel pump primes readily and all lights etc are as they should be as is fuse
• Renault Clio II (2001 - 2007) - 03 1.2 sudden loss of power 21 Nov 2009 (Forum)
  , especially when you accelerate at anyting more than a very gentle pace. It does this in every gear. Its not the clutch as that was replaced Fairly recently and it is a definate loss in power not clutch slipping. It has had a few electrical problems recently and I have removed the ECU black box cover
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  Well soaked 17 Oct 2009 (Ask HJ)
  Yesterday I noticed water in the rear passenger foot well of my VW Passat saloon. Year is 1999. I am not sure how it got there and I no nothing about cars...
• Vauxhall Astra F (1991 - 1998) - 94 1.4 non starter 10 Aug 2009 (Forum)
  volt line and is sunk by terminal B6 of the ECU. The 12 v on the switched terminals of the relay is from the permanent 12 V supply. (and yes I do have a good earth on the pump connection!) Is the fault likely to be on the ECU (terminal B6 not sinking the coil current?) or should I be looking at some