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  Overfuelling 1.4-litre CVH engine - what's the issue? 1 May 2013 (Ask HJ)
  I have a Mazda with a 1.4i CVH. The problem is over-fueling. Which sensors should be at fault and what engine would be compatible to fit the gear box?
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  Disconnecting the battery - hybrid alert! 26 Nov 2012 (Ask HJ)
  I will not be using my car for nine weeks (it will be left in the garage), and to ensure that the battery does not go flat period I want to disconnect...
• Vauxhall vectra B 1.8 pet 1978/79? Engine x18xe - misfiring Vectra b on tickover 12 Oct 2012 (Forum)
  ecu earth fault, but also someone seems to think it could be the ECU itself, but as this is a costly exercise to test repair or replace i thought I'd ask your advice as to my next move. Help needed asap as I'm self employed and this is my work vehicle Many thanks
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  Is my Galaxy worth repairing? 22 Aug 2012 (Ask HJ)
  Taken car to main dealer after power failure. Indications are that PCM is malfunctioning and replacement needed. Dealer explained that there may be other...
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  Is it legal to remove the DPF from a diesel car? 28 Jan 2012 (Ask HJ)
  I've seen adverts for companies that can disconnect the diesel particulate filter from the car's ECU. Is this legal and does it make the car better? I...
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  Golf losing power 9 Jan 2012 (Ask HJ)
  My 6 year old Golf started to lose power going uphill on a long drive today, that is to say I was pressing the pedal but no acceleration was forthcoming. Thereafter,...
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  Gas trick influencer 19 Sep 2011 (Ask HJ)
  I am about to retire and would like to reduce running costs on my 60,000mile Chrysler 300 CRD. I would like to improve the fuel economy, which at the moment...
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  Winding down 15 Aug 2011 (Ask HJ)
  I own a 6 year old Skoda Octavia 1.6FSI with 50,000 miles on the clock. Three evenings ago I locked the car, only to find later that the windows had all...
• 2006 GT TSI 170BHP - VW Golf Mk 5 ABS ECU Pump Light On! 21 Apr 2011 (Forum)
  Hi All, The sun is shining and its time to get the annoying fiddley jobs done!! I was in with my local garage today trying to get...
• Renault Megane Coupe Dynamiqu + 1.6 16v - engine management light was showing on his dash 11 Apr 2011 (Forum)
  ) ? ? So he had the ECU checked ( the result was to replace the all 4 coils ) ? BUT WITH THE BASIC  DIANOSTIC MACHINE THE MECHINIC HAD COULD ONLY READ
• Land Rover Discovery II - Repair Problems 7 Mar 2011 (Forum)
  for another 200 miles and then started running rough and mpg dropped by nearly half. From the middle of November till the end of January the car went back and forth to garage trying to solve the problem, which at that point they decided was the ECU, this was sent off for repair. On the 16th
• Vauxhall Corsa C (2005) 1.2 SXI - EML on and loosing power! HELP PLEASE? 30 Jan 2011 (Forum)
  Unit (ECU) after replacing the coil pack and sparks plugs also. I had the ECU replaced and this did not rectify the problem. I then had it re-diagnosed by a different garage as the head gasket which, as the car was blowing white smoke, was understandable. The car no longer blows white smoke but still
• Ford Fiesta Saloon - EAC FAIL solution needed 18 Sep 2010 (Forum)
  . It appears that the culprit might be the Power Modul. The last time i had a fault i was told it was this and that but turned out to be the coil pack. I dont really want to get into that situation again spending money with no cure. I followed a link on here to the ECU doctor. That seemed to me
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  My 2001 Vauxhall Astra won't start - any idea why? 15 Sep 2010 (Ask HJ)
  I've got a problem with my 2001 Vauxhall Astra 1.8 SXI, which won't start in the mornings but will go with a push. Once started, if I turn it off will...
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  My Ford is pinking under acceleration - what's causing this? 6 Sep 2010 (Ask HJ)
  I took my 52-plate 1.8-litre petrol Ford to the Ford garage who recommended getting the ECU/EMS diagnosed and set up correctly. They want £50 to do so...
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  How can I turn off my Mercedes-Benz E-Class' service indicator? 20 Aug 2010 (Ask HJ)
  My local garage expertly services and maintains my Mercedes-Benz E200 Kompressor estate. However, as it is not a Mercedes-Benz dealer, they cannot switch...
• FORD Galaxy 1.9 tdi - White smoke everywhere 27 Mar 2010 (Forum)
  there is so much white smoke it's unbelievable. It looks as if the car is about to go up in flames. A week a go I had the engine codes read, P1570 and P1557. engine ECU blocked and Turbo pressure control repectively. I had been having a problem with dramatic power limitation at 60mph and also irractic
• Toyota Avensis (2003 - 2008) - 2001 1.8VVTi Co2 emission fail 16 Aug 2009 (Forum)
  smoke reported by the tester but agrees there is a problem As far as I know car drives fine. Although it has always used oil which is a common problem. Tomorrow they are swapping in an ECU from another car and will reprogramme it to see if that fixes the problem. Failing that they are out of ideas
• Vauxhall Vectra B facelift (1999 - 2002) - 01 1.8 Fault lights driving me crazy! 21 Jul 2009 (Forum)
  for two days in a row. ABS seems to work fine though! Garage said it was the ABS ECU. Had this changed for a tested second-hand one - still just the same. Also checked over/ cleaned the big plug to the ABS ECU. Looks fine, no corrosion or dodgy wires. 2) Engine light (not spanner) Comes on about once
• Renault Megane II (2002 - 2008) - 05 1.9 Intermittent Electrical Fault 3 Jul 2009 (Forum)
  this forum and the internet it seems that renaults are famed for electrical problems. I've seen anything from change a fuse to changing the ECU which appears to be a costly job. I know it is difficult for anyone to give an opinion on this but someone may have an idea should the service centre come back