Ask Honest John

Most recently answered spark plugs questions
I've bought spark plugs to change on my BMW, only to find plug spanner does not fit. Can you please advise where I can buy the right fitting spanner?
Two months ago my car broke down and needed to be towed home by the RAC. My local Ford dealer diagnosed the problem as a blown spark plug which had disintegrated and damaged the forth cylinder, requiring...
I've got a 2005 Ford Focus. A few weeks ago it started juddering and the engine light was flicking intermittently. My mechanic found lots of brown, horrid water in with the spark plugs, which were very...
My Toyota garage says that if I replace the spark plugs with 'Laser Iridium Premium NGK IFR6T11' they will cause problems - what problems - not stated. These are not the recommended plugs, but I have...
I have been offered an full annual service at a Citroen dealer for £300 for my four-year old C1, or a deal at £200 by the same garage for a service that mainly differs in not changing the spark plugs....
I have a problem of liquid getting into the spark plug chamber of my 2005 1.6 Ford Focus petrol hatch, and wondered how to stop this. An RAC operative said that he thought that the HT leads might be too...
Rain water is filling around spark plugs on my Fiesta.
For the past four years, I have enjoyed completely trouble free motoring from my 2004 Audi 2.4 V6 saloon, thanks entirely to the superb (and modestly priced) servicing care received from my local independent...
One cylinder on my 02 Mondeo is not firing. The garage replaced the coil pack, plugs leads, injectors and rail and they've done a compression test. The same cylinder that wasn't running before this still...
My son in law took off his plug leads and didn't notice how to put them back. Would it be possible for you to tell me which plugs go where?