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• VW polo cold start 5 Mar 2004 (Forum)
  Its only been this over the last week. Could it have something to do with the inlet manifold preheater relay in the ECU. oh it a 1992 polo single-point injection. Any ideas??
• Auto Electrics Specialist near M/cr? 23 Feb 2004 (Forum)
  I've checked out the garage guide but wondered if anyone knew of a specialist in the Nth Manchester area. My wish list is Audi knowledge Good with ECUs Has access to Audi A6 workshop/wiring manuals Charges fourpence If you want the full SP on my nightmare it's in technical, suffice to say I last saw my car on 16 December and it is still in dock
• Cavalier Mk3 won't start 22 Jan 2004 (Forum)
  Mk 3 Cavalier 2.0i auto 1990, getting fuel (so not relay)& spark but it just won't start. I've tried 2 different ECUs from the scrapyard, checked and WD40'd all the connectors I can find, distrubutor cap etc cleaned, plugs & leads ok, new air filter, tried with no air filter, earths ok, battery fully up. Started as an intermittent fault but rapidly got terminal.
• Vw Golf MK1V dash rattle 17 Jan 2004 (Forum)
  Hi all, I've just bought a Golf Tdi 52 plate and it has an annoying rattle that's coming from behind the dash clocks on the drivers side. Is there an ECU under there or could it be the air vent pipe ? I'm asking this before i let my dealer start taking it apart and possibly creating more noise after they put it back together. Any help would be grately appreciated.
• A basic (perhaps even stupid) question 3 Nov 2003 (Forum)
  Apart from the radio code, do I need to be aware anything else if the battery is disconnected: ie will the ECU and other electronic gubbins reset itself etc ? With thanks in anticipation AI
• Vectra cdti - 150 Need help egr ecu troubles. Pulling hair out 22 Jun 2017 (Forum)
  Loss of power / acceleration. Would ecu not make the corrections to deal with change.? Will an egr / swirl delete solve the issue. ? Could it be im looking at the wrong things. ? Something ive missed. I have the car booked in to do a smoke test tomorrow to look for any small leaks that may not be visible.
• Smart Forfour - Merc/smart failure to resolve. Please Advise. 10 Mar 2014 (Forum)
  Fixing the car has become a saga at Mercedes Tonbridge, with them overcharging, making errors of diagnosis, and giving back a car with a failed ECU but not accepting responsibility. The letter below tells what happenend, but am I being unreasonable to expect they repair the ECU considering it was fine when I gave it to them. I would be grateful for advice thanks.
• Vauxhall Vectra C - Vauxhall Vectra ECU nightmare. 23 Jan 2013 (Forum)
  In this country I need a car and if I'm to have a newer efficient car then I must live "over the barrel" as any of these computer/ECU problems will mean an enormous bill or as one mechanic said " a written off" motor! It would seem that this situation is worsening as cars become ever more complicated and computerised. Even a simple brake pad change in some vehicles now requires it be plugged in to a computer.
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  Should I specify the Standard or Sport suspension when I order my new Audi A1 TFSI Sport? 22 Oct 2010 (Ask HJ)
  I'm tempted to order an Audi A1 1.4 TFSI Sport DSG but can't find one to drive. Your review gave me a lot of confidence, but could you please answer two...
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  Why have my cornering lights stopped working? 17 Jul 2025 (Ask HJ)
  My Vauxhall Insignia cornering lights have stopped working. Do they work on a fuse? Can you help me please?
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  How can I prevent my van being broken into? 22 Apr 2025 (Ask HJ)
  An overnight attempt to steal my Citroen Relay involved the thieves cutting a hole in the front offside panel and disabling a sensor that opened the central...
• Ford Focus 1.0 ecoboost 2016 - Should I replace my catalytic converter? 9 Oct 2023 (Forum)
  I've taken it to two different garages who have told me it's an emissions fault, and a) use high grade fuel, then b) replace the O2 sensor (which they did), then c) repair the ECU. After that final advise I took it to the main dealer who said the ECU needed updating (which they did), and after the light turned on again(!!), they told me it needed a new cat as the o2 sensors were reporting the same reading.
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  Should I fit a fuel saving device? 15 Aug 2022 (Ask HJ)
  I have read about a device that plugs into the car under the steering column and claims to reduce fuel consumption by about 35 per cent. Is the claim valid?...
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  Why won't the roof of my Peugeot 307 CC open? 10 Feb 2017 (Ask HJ)
  When I try to open the roof of my Peugeot 307 CC it says 'operation impossible, screen not in place'. What does this mean? I have only just bought it
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  What do I do about the ESP failure on my 2005 Volkswagen Golf? 16 Jan 2017 (Ask HJ)
  My 55 reg Volkswagen Golf has ESP failure. What am I best advised to do about it?
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  Electric window not working 6 Feb 2016 (Ask HJ)
  My electric Windows have stopped working I had posted this yesterday on here but can't find the question. I have had a reply saying it could be water got...
• Combo C 2002/2004 - Combo C Fuel Pump fault after engine transplant 1 Jan 2015 (Forum)
  Can anybody watching explain what actually turns on the power to the fuel pump and how the pressure regulation system works. I presume that the ECU controls all of this, but am not sure.I am tempted to just hotwire 12v onto that blue/red wire..but am fearful that the pressure regulation might involve fedback via the ECU so could have a bad outcome.
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  Diesel in oil - how has this happened? 25 Nov 2014 (Ask HJ)
  I had the ‘Engine Malfunction’ warning light on my Ford Mondeo (2008) recently. I took the car to my local dealer and they said it was down to a faulty...
• Subaru - Tip for 2.0 owners suffering performance flatspots 3 Aug 2014 (Forum)
  I took it to the dealer and they said that there were no fault codes, nothing wrong with the car, and so they just 'reset the ECU' and gave it back to me 10mins later. Strangely enough it seemed to drive better and I thought no more about it. Over Christmas and New Year I noticed it flat spotting again and so called the dealer.
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  Refunds 11 Apr 2014 (Ask HJ)
  I bought a Freelander 2 in July 13, in Feb of this year it went in for a new rear differential (one of the bearings had failed). Since this was fitted...