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• Snake oil that seems to work! V Power + Nitro 5 May 2017 (Forum)
  A regular route over a bridge a mile long with a 50mph limit, before when going up the incline if the speed droped below 49mph the car changed down to 5th, Now the speed needs to drop to 45mph before it changes down. Cant think of any other reason or explanation for this other than fuel. Fuel ecomomy is improving but thats as likley to be temperatures rising so cant really say. Maybe I've not been waisting my money , I will keep going with it anyway.
• 2006 Mondeo 2.0 HDI Diesel, 30,000 miles - 2006 Mondeo 2.0 HDI "pulling"/"jerking" 4 May 2017 (Forum)
  However, I noticed the occasional "jerk" or "tug", almost as if the car wasn't putting quite enough fuel into the engine. This disappeared as soon as I put my foot down a little and everything was normal. But it would reproduce itself when coasting at around 70mph in fifth gear. Revs over 1500. I've noticed this at slower speeds in 4th, but far less.
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  Are there any tables that show comparisons of NOx levels in all cars? 21 Apr 2017 (Ask HJ)
  I want to replace my diesel Estate with a petrol SUV. The Ecoboost engine would be a good choice but I believe the NOx levels are very high. Are there...
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  What automatic is the better buy - the Kia Picanto or Kia Venga? 21 Mar 2017 (Ask HJ)
  I'm looking to buy a car with an automatic gearbox and am willing to spend around £5000 - £6000. From what I saw on the internet, my two options with low...
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  What 7-seat vehicles should I look at on a £10,000 budget? 16 Feb 2017 (Ask HJ)
  I'm looking for a second hand 7-seat option vehicle with lots of space and have up to £10,000 to spend. The two models I'm considering at the moment are...
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  How important is it to use super unleaded fuel if recommended by a manufacturer? 29 Dec 2016 (Ask HJ)
  I have just bought a 9 month old third generation Honda Jazz SE. The manual recommends the use of 95RON super unleaded petrol. Will I damage the engine...
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  Buying a four-seater sports car - any suggestions? 5 Sep 2016 (Ask HJ)
  I'm looking for a car with a V6 or a V8 that sounds great. Fuel economy is not an issue. I previously had a Nissan 350Z but because it had two seats...
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  Problematic Honda Jazz - repair or sell? 26 Aug 2016 (Ask HJ)
  My Honda Jazz had a new clutch two months ago (£800) and has now developed problems with the throttle body, which will cost £550 to fix. It is 2005 model...
• Nissan xtrail 2003 diesel 2.2 - Nissan X trail Intermittant fault! Can anyone help 12 Aug 2016 (Forum)
  So far it has been serviced, filters sorted, fuel regulator changed, air flow meter changed. It did show up once as a fault with the airflow sensor but whenever i took to the garage it would stop doing it and and drive fine. frustrating! the guy at the garage said could be the injection pump possibly?
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  Can I swap my Audi A5 wheels to my new S5? 4 Jun 2016 (Ask HJ)
  The Audi S5 I am looking to buy has optional, enormous, 'exclusive' 20-inch wheels. As I understand it, they are heavier and the tyres are more expensive...
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  Should I continue to use Shell V-Power Nitro +? 21 May 2016 (Ask HJ)
  We've always used Shell V-Power Nitro + in our DS3 DSport plus. Next week we are changing it for an Hyundai i20 1.0t, should we continue to use the same...
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  Starting problem 9 May 2016 (Ask HJ)
  I have an intermittent starting problem with my Jaguar XJS. The petrol pump should run for 10-15 seconds after switching the ignition to prime the system...
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  Spontaneous combustion - compensation? 16 Mar 2016 (Ask HJ)
  My 4-year-old Audi A1 spontaneously combusted 800 metres from home and is totally written off - potentially lethally for my wife who was driving. Had...
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  Why does my Peugeot 807 keep stalling? 11 Mar 2016 (Ask HJ)
  We have a 2006 2.0-litre petrol automatic Peugeot 807. It runs well and when plugged into a diagnostic machine there are no faults or issues. However,...
• Audi A3 2002 1.6 petrol misfire ? 24 Feb 2016 (Forum)
  Also the coil (which is used for 2 cylinders) has been inverted, the fault stayed on cylinder 2. It’s not the fueling as all petrol injectors all spray the same. Also the problem does not change when switching between petrol and LPG fuel. It doesn’t appear to be the engine either. A compression test gives the same pressure on all cylinders.
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  Why is my diesel Focus costing so much to run? 8 Feb 2016 (Ask HJ)
  I had the DPF and thermostat replaced in my 2004 Focus by my local FOrd garage six months ago at a cost of £1800. A warning light has now come on and they...
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  What is the emissions situation on larger and thirstier diesel engines? 25 Sep 2015 (Ask HJ)
  With all the current hype about diesel cars, the fact that all commercial transport is oil fuelled seems to have been overlooked. What is the emissions...
• Chrysler Grand Voyager 2.8 auto - voyager starting problem 3 Sep 2015 (Forum)
  I have changed the battery to a fancy gel one, two starter motors, crank and cam shaft sensors, new fuel filter and primer part on top. ( when this was changed it was perfect for a week, then all of a sudden back to normal.) since then priming the fuel guaranteed a start. Now nothing works it just cranks and cranks.
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  Hyundai Tucson - automatic or manual? 29 Aug 2015 (Ask HJ)
  I'm considering buying a Hyundai Tucson. My mileage is 6000 a year so am looking at a petrol engine. Which engine and transmission would you recommend?...
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  Jaguar XE engine choice? 24 Aug 2015 (Ask HJ)
  When will Jaguar replace the Ford based 240PS engine in the XE as I don't want to purchase an old specification, but I don't want to wait beyond the change...