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  Can I remove the DPF from my car? 24 Aug 2013 (Ask HJ)
  I have 2010 Ford Focus and am considering a DPF removal. The system itself hasn't given my any issues, but I am worried about future problems. Is this...
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  Phantom of the operator 21 Mar 2009 (Ask HJ)
  I have a question regarding my 2002 Mercedes SLK 320 manual. Over a period of 2 years the car has failed a total of 6 times. On the first 3 occurrences...
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  Renault Megane Scenic parking brake problem 25 Jan 2013 (Ask HJ)
  We had a battery problem and had to start the car by manually releasing the automatic handbrake. We rolled the car back and up a small slope. The brake...
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  Problem with a recently purchased used car 5 Jul 2012 (Ask HJ)
  Bought an Insignia CDTI Elite 160 (used, 2009 58 reg). I have had it for 1 week. The car has started to judder every now and again in 2nd/3rd at low...
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  Focus TDCi won't start 3 Aug 2011 (Ask HJ)
  Was driving home when my car juddered to a stop & cut out. Have had the Cam & crank sensors changed & a new fuel filter. There is pressure at the injectors...
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  Window malfunction 9 Jan 2013 (Ask HJ)
  All the windows of my 2009 Octavia estate open when the handbrake release is pressed.
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  Why won't my Vauxhall Vectra rev up? 2 Sep 2010 (Ask HJ)
  I have a Y-reg Vauxhall Vectra 1.8 SRi. Can you tell me why it wont rev up?
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  What can I do about my 2005 Citroen C3's starting fault? 2 Aug 2010 (Ask HJ)
  I initially had trouble with my 2005 Citroen C3 automatic with stop/start not starting, and the garage advised a new battery, which when fitted was OK....
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  What's causing my Vauxhall Vectra's engine fault? 25 Jul 2010 (Ask HJ)
  The ECU light is on the dash (engine symbol) of my 2000 Vauxhall Vectra 1.8 16v and it runs pretty badly. I have read all the information I can find, and...
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  Why will my Citroen Xsara not rev properly? 9 Oct 2019 (Ask HJ)
  Do you have any advice as to why my Citroen Xsara 1.4 petrol won’t rev properly? I’ve changed the throttle body and added fuel treatment. It runs and drives...
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  Warranty company won't pay out - what can I do? 7 Jan 2014 (Ask HJ)
  The ECU on my 2006 BMW 3 Series has failed due to water ingress caused by leaves blocking the drain holes. My warranty company has said the problem is...
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  Zafira diesel particulate filters 31 Dec 2011 (Ask HJ)
  I recently had to have a new DPF fitted to my Zafira 1.9cdti (120bhp). It has been on the car less than a month and now suddenly the car goes into limp...
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  My Peugeot 106 diesel won't start after running out of fuel. Does it need to be bled? 27 Aug 2010 (Ask HJ)
  My Peugeot 106's battery went dead so I gave it a jump start from another car and it started straight away. I put a new battery on it, but it had run out...
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  Big dripper 20 Feb 2010 (Ask HJ)
  I am faced with a bill of over £600 for a replacement ECU in my wife's MKI 2004 Skoda Octavia VRS, as it failed due to water ingress. Is there some sort...
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  How can I verify a car's mileage? 12 Aug 2014 (Ask HJ)
  I want to buy a used Mercedes-Benz, but am worried about cars with hidden histories. Is there a way to check mileage has not been tampered with?
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  Fuel injector change - easy? 9 Jan 2013 (Ask HJ)
  I am just inquiring whether changing the fuel injectors on the scenic is a straight forward job, i ave changed the plugs and coils at present but need...
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  Golf opens itself 16 Aug 2012 (Ask HJ)
  Why does my central locking open by itself and at the same time electric windows also go down by themselves? This happens when car is locked and no one...
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  Peugeot 1007 automatic fault 9 Apr 2012 (Ask HJ)
  While driving the car stopped and on the screen it came up automatic fault the car wouldnt go into gear i switched off the engine and restatred it it was...
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  K&N air filter 16 Oct 2011 (Ask HJ)
  I'm thinking of fitting a K&N air filter to my Toyota Auris 1.6 petrol manual 2008. Would it improve performance, affect fuel economy, or affect my insurance?
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  Fuel consumption 5 Dec 2010 (Ask HJ)
  I have a Peugeot 206 2.0-litre HDi, which has suddenly started using fuel excessively. What could be the cause? It used to return approx 50mpg but this...