Ask Honest John

Most recently answered nox emissions questions
I am seriously concerned with all this talk about a diesel backlash coming from the government and motoring press. I have a six year old Volvo XC60 and I'm really worried that it could be heavily devalued...
Has anybody else had a reduction in their fuel economy following the recent emissions upgrade? The range on my Audi A4 has gone from 620 to 570 miles per tank. Audi say it's nothing to do with the upgrade,...
Since taking my 2011 Volkswagen Caddy Maxi 1.6 in for the emissions update I've noticed a marked increase in fuel consumption (down from 48-50+ to 36-38) and poor performance below 2000rpm in third, fourth...
I'm thinking of buying a Ford Mondeo Estate, 16 or 66 plate. I drive around 30,000 miles per year, of which 20,000 are motorway miles. Would you opt for diesel or petrol? I plan to keep the car for four...
I've been looking around lately for an Audi A8 and have seen a 2005 4.2 TDI twin turbo with 128,000 miles on the clock. Is it worth buying?
My diesel Audi 2.0-litre has been remapped. Will the emissions fix undo my remap, thus meaning I will have to pay to get it done again?
With the upcoming tax changes and the potential backlash against diesel, can we expect to see more petrol engine cars? I would love to see a Ford Kuga with a 2.0-litre 240PS EcoBoost engine.
Since my Audi A3 had it's emissions fix it has had problems with the engine management system light flashing intermittently and the engine losing power. I've taken it to the Audi garage today and they're...
I've just taken my Audi A6 in to have the emissions fix because Audi insisted that the performance, fuel consumption and CO2 emission will not be adversely affected. I instantly noticed driving back home...
Last night my Volkswagen Caddy lost power on the M5 (with 3 children in the back) and I had to be towed off. It had the emissions update a week ago and the RAC diagnosed an injector fault. Volkswagen are...
 

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