Ask Honest John

Most recently answered technical issues questions
My oil light came on so I went to Halfords to be sold 2l of oil for £21, own brand. I was left with the distinct impression that only this oil would do and if I were stupid enough to put anything else...
Heating has packed up on my ford fiesta t reg,(blows cold air only. Have already replaced thermostat. What else could be the problem?
I have a Vauxhall Zafira 2003, 105000 miles otc.Recently serviced as usual by dealer.Developed a tapping sound, only noticeable on acceleration to 2250 to 2500 revs. Car runs as usual. Dealer decided...
We currently run a 59 plate SEAT Leon 1.9 tdi S and a Volvo V50 company car which is being withdrawn at the end of February. The Leon has an intermittent reluctance to start, seems to be mostly cooler...
I have a Skoda Octavia 1.6. It has 170,000 km in good condition but it has problems - black smoke from the tail pipe and a high fuel consumption. I changed the spark plug, timing belt, water temp sensor,...
I own a Ford Focus 05 1.6 90bhp, I recently changed the battery and mpg has risen via EMC can I get it back to the lower figure by reconecting battery again, or is it a dealer issue. Also do you know if...
Having followed your excellent advice over the years we bought an economical Honda Jazz a year ago. Since then we have been plagued by condensation on all windows which can be eliminated by use of the...
My Hyundai dealer is unable to answer my query about the appropriate winter tyre to fit to my 2007 Tucson, but alarmingly has advised me that Hyundai will only recommend fitting the original alloy rims...
I needed a jump start on my car recently, and now the 2 rear doors wont open or lock with the key (only manually) and the 2 front electric windows wont work, do you know why?
The traction control system on my Seat Leon 03 turns itself off and can't be switched back on via switch. It comes back on after the car has been switch off sometimes.