Ask Honest John

Most recently answered lack of power questions
I own a Renault Kadjar Dynamique Nav DCI with a 1461cc engine on a F plate. It is in what I believe is known as Limp Mode. There are 2 warning lights showing...'check injection' and 'check anti-pollution...
I have just bought a 2013 Ford KA. It has 13,000 miles on the clock. We live on a steep hill and it can barely get up the hill from a standing start with one driver and no luggage. Our old KA could do...
My 2015 Volkswagen Caddy 1.6-litre TDI is losing power. It starts fine and ticks over. Can you tell me what the problem may be?
I've just bought a Renault Megane 1.6 petrol. When I start the engine, it starts but loses power at first. It needs a bit of accelerating to keep the engine running. I have changed the spark plugs already,...
I am having some problems with my 2005 Vauxhall Vivaro van. The engine has virtually no power until it reaches 25000rpm. I’ve changed the air filter, mass air flow meter/sensor boost pressure sensor, and...
My Volkswagen Passat 1.8 petrol loses power gradually when driving from 70mph to 40mph. Sometimes it seems as if its being choked, while other times it drives fine. Any ideas?
My Mazda 3 recently had a refill of the DPF fluid and forced regeneration by a main dealer due to an engine management light coming on, which produced DPF related error codes. The car subsequently ran...
I have a Volkswagen Eos with a TDI engine and DSG gearbox. It's four years old, but only shows 28,000 miles with four Volkswagen main dealer services. When cold the car moves reluctantly and higher revs...
We love our car but we have had an unresolved engine management issue with it since the middle of 2012. The engine management warning light came on (on Friday 13 July!) and immediately the car lost all...
The garage says I need a new turbocharger. It boosts through the lower gears, but when it's on an incline, it seems to hold back and stay on 2000rpm in sixth gear. There is also the smell of exhaust fumes...