Ask Honest John

Most recently answered technical issues questions
Petrol has been added to my diesel Nissan Note. The tank has been drained and a new filter change. The car will start but is very sluggish and does not seem to have any power. The turbo will also not engage...
I put my Saab in for a service recently after noticing a change in engine noise following a long journey. The garage told me the car had no oil and replaced the engine and turbo at a cost of £3000. Since...
I have a dangerous misfire on 13 year old Jeep Grand Cherokee 4.0-litre petrol. When partly warmed up, it goes through a spell of chronic misfire on part throttle. However, when 100 per cent warmed up,...
I’m having some problems with my 2004 Citroen Xsara Picasso. The engine management light comes on and the car goes into limp home mode. I’ve had a diagnostics test carried out and was informed that the...
We’ve got an intermittent electric fault on our 2008 Vauxhall Corsa. The problem is sporadic, but results in the failure of the dashboard and lights. I’ve had a diagnostic test carried out, but it didn’t...
My 2008 Fiat 500 1.3 diesel blew it's injectors recently while travelling along a country lane. Fiat have said it’s out of warranty and won’t give me anything towards getting it repaired. I spent my life...
My 1999 Ford Galaxy 2.3 petrol automatic won’t start. I’ve turned the key, but nothing happens. I've tried charging the battery and using jump leads, but still nothing. Can you help?
My wife has bought a 2012 Mini Countryman with a diesel engine. She does about 3000 miles a year on local trips; what problems can she anticipate with the DPF?
I will be out of the country for three months at the end of the year and have to store my Mercedes-Benz CLK outdoors under a good sheltered car porch. Can you tell me which steps I need to take to prepare...
Are tyre pressure monitors worth the money and do they work as stated?