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• 
  Why does my BMW have two batteries? 12 Mar 2025 (Ask HJ)
  There are two batteries in a my BMW 330e 2017, excluding the high voltage battery. One auxiliary battery under the bonnet and another battery in the boot....
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  I need to disconnect my car's battery to do some work - how do I reset the radio code afterwards? 13 Aug 2017 (Ask HJ)
  I want to disconnect the battery of my Vauxhall Tigra to carry out some work but I do not have the code for the factory fitted radio. How do I reset the...
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  Buying a Mazda with high mileage - what should I check? 10 Jun 2015 (Ask HJ)
  I have the opportunity to purchase for £5750, a company owned (one driver) 2011 Mazda 6 Sport Diesel Estate. It has covered 113,000 miles (mostly motorway...
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  Can you jump-start a car from the cigarette lighter? 3 Oct 2012 (Ask HJ)
  I have some questions for you about the use of jump leads. I have seen an advertisement that states you can plug them into the cigarette lighter socket...
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  Can I replace Castrol Valvemaster with Miller's VSP Power Plus in my 1967 Triumph 2000? 25 Aug 2012 (Ask HJ)
  I run my 1960 Standard Vanguard using Miller’s VSP Power Plus as a lead replacement additive. I have now acquired a 1967 Triumph 2000 which has been run...
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  Starting trouble - can you help? 22 Nov 2011 (Ask HJ)
  I'm having trouble starting my Ford Focus in the mornings. I've changed the battery, but it sounds like the engine is struggling to turn over. However,...
• 1998 Mondeo 1.8 - Coil pack or something else? 3 Jan 2012 (Forum)
  As it warms up it gets a bit better, but isn't right. I have replaced plugs, which has helped (one was cracked). Swapping the HT leads made no difference. So my next suspect is the coil pack. Before I head down to the scrappy for a replacement, is there anything else I should be investigating? At the moment removing lead on 1 or 2 once running makes no difference.
• Ford Focus (1998 - 2004) - 02 1.6 Sudden misfire on cylinders 1 and 4 25 Oct 2009 (Forum)
  hi Car suddenly quit. left it with local garage who Changed the following: Coil pack Leads plugs These had no effect at all, The mechanic said he disconnected the leads on 1 and 4 whilst running and there is no difference. His computer apparently said feed 1 and feed 2 at coil not present. he did not give me codes.
• Ford KA, KA2, KA3 (1996 - 2008) - EMU light permanently on 31 Jul 2008 (Forum)
  Hi I have just had the HT leads, plugs and coil changed after problems with a faulty lead. At the garage this morning the mechanic reset the EMU and the light went out, but when I drove the car this afternoon the light was back on again, permanently.
• Rover 200 (1995 - 1999) - 97 1.6 How was it running at all? 20 Jun 2008 (Forum)
  I've just replaced the Dizzy cap on a colleagues 216 16v as it was running like a bag of spanners. When I took the cap off, the carbon brush literally crumbled into dust & the main coil lead snapped clean off at the cap end (it had gone a mouldy green colour). I replaced the coil lead as the other 4 looked brand new and the car now starts first time and runs nicely now, but I am amazed how the car was even running in the first place!!
• spark plug removal - 1.6 Astra Automatic 10 Feb 2006 (Forum)
  Without sounding like a complete novice which i am ,I need information how to remove spark plugs from my Astra 1.6 automatic.The HT leads come from a rectangular box attached to the top of engine.The actual leads are a black corrugated plastic covered.Where they attach to the top of the spark plug there is a concertina like shaped drum.Ive looked in the Haynes manual but it does not refer to this type.I dont really want to start pulling anything out incase i do damage.Ive done 32000miles .They are due out at 40000miles .Can anyone help please.
• BMW M3 convertible 8 Jun 2007 (Forum)
  Does anyone know of any battery problems with this vehicle, leading to fire and eventual destruction?
• GOLF 2L MARK4 GTI - CUTTING OUT WHEN SLOWING OR STOPPING 5 Feb 2011 (Forum)
  Hi everyone My golf keeps cutting out when i slow or stop and is very lumpy when idling and sometimes also cuts out when idling i have replaced within the last month as follows spark plugs and leads, oil and filter, i cleaned the throttle butterfly, air mass meter, collant temp sender,and both lambda sensors (very expensive) this just started yesterday after i changed the leads again because i felt like there was a miss and i brought the last set of leads of ebay (never agan) and sometimes when i turn a corner the oil pressure warning light comes on plus i was getting a clicking from the engine somewhere i read this could be that the oil needed topping up so i did and the clicking went and also the warning light stop coming on but i keeps happening so i top up and stops again (bit worried about this as there is not an oil leak anywhere) please can anybody help me with any of these problems Thanks
• Daewoo matiz chugging? 11 Jan 2007 (Forum)
  This morning for the first couple of miles the same fault appeared, and it has been fine since, Today i got a new dissi cap. rotor arm, and h.t. leads including the one from the coil. The suppier sold me the wrong cap and rotor arm so i have only replaced the h.t. leads at this time, and the one from the coil. If the fault re-appears has any-one any suggestions as to what it may be.
• basic car stereo questions 9 Aug 2003 (Forum)
  I have been advised to connect the two front channels to a tweeter and a 3 way unit each in parallel but I have also read that this could lead to blown final stage transistors. I have also been advised to connect the two front channels to a tweeter and a 3 way unit each in series but I have also read that this might lead to problems as the speakers connected in series will have passive crossovers wired in them and conneting in series would lead to frequency confusion at both speakers.
• Seat Leon discounts 19 Apr 2005 (Forum)
  Removed as duplicate post in Discussion, thus leading to possible repetion of replies. DD
• 2005 Ford Focus 1.6 - core plugs leaking on cylinder head 20 May 2013 (Forum)
  I know about the problem regarding the washers leaking onto the valve cover, but after fully drying the head, plugs and leads, this car ran like a sewing machine for 5 or so minutes then started to misfire. I removed No.3 lead and found water in this side again. It does look as though the core plug is leaking. Are these normal press fit core plugs or are they threaded?
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  Why does my Ford Mondeo 'splutter' when accelerating in higher gears? 4 Jul 2010 (Ask HJ)
  My Ford Mondeo mk2 2.0-litre estate 'splutters' when trying to accelerate in higher gears. It will sometimes take a while to start in mornings as if starved...
• Corsa Stereo Connections 15 May 2010 (Forum)
  Also if (and when) I do find the correct connection, how do I change the pins in the sony lead - they seem to be stuck fairly tight and no amount of pulling with pliers works. All help / advice warmly welcomed.
• Jeep Cherokee (1993 - 2001) - 95 2.5 Won't start 4 Dec 2008 (Forum)
  Have traced the problem to the distributor, changed cap and arm but it appears that the problem is on the lt side. Lots of welly from the coil, big sparks, but no welly through the cap to the ht leads. changed all leads, but no difference. Traced 3 wires to the dizzy, black w/ purple +11 volts with ignition on and 2 orange w/black which seem to do nothing any suggestions would be most gratefully received.