Ask Honest John

Most recently answered remapping questions
I recently met a man who has the same car as me, a Honda Civic 2.2 CDTi (10 Reg). He had had it remapped and said that he now is able to achieve 60mpg on a run. Do you think that this is a sensible idea...
My one-year-old Suzuki Grand Vitara has just reached 13,000 miles. Full torque on this engine is at 1950rpm, but the RPM pick up is slow. Then it seems like a switch is thrown and the engine develops a...
On 7 July 2010 you stated that the Vauxhall Insignia 2.0 CDTI 160PS model now benefits from CO2 emissions of 144g/km. Can 2009 cars be remapped to achieve this?
I was recently 'invited' by my supplying dealer to bring my 10-month-old 170 BHP Volkswagen Scirocco TDI/DSG car in for what was termed an 'Express Visual Check'. The car has done 13,300 miles and is running...
My Y-reg 1.8 Vauxhall Vectra Estate has started spasmodically flat-spotting for a few seconds at a time. It then picks up again and it may not happen again for several days or weeks. It appears to happen...
My 2002 Zafira 1.8 Elegance automatic has started losing power when being driven at a steady speed. It works well at lower speeds or in narrow country roads. At same time, the cruise control has stopped...
I have a BMW E46 and I'm planning to get my ECU remapped. Do I need to inform my car insurance provider? If I do, will they increase my premium? What if they refuse to add my modification? Do I have any...
I need to gain an increase in power (about 15-20 per cent) from my 2001 1600cc Focus automatic, which I believe can be achieved with remapping (or re-chipping as I think it is sometime called). I tow a...