Ask Honest John

Most recently answered injectors questions
There seems to be a modern issue of cars with direct injection and carbon buildup leading to expensive failures. Can you recommend a car brand and or models which don't experience this issue. Ideally want...
I've had this car for three years and it has done just under 60,000 miles. During that time it has has various problems (sound system replaced, clutch and mass balance flywheel replaced, alarm system replaced,...
When I try to start my 2005 Renault Scenic I hear some strange clicks and then nothing happens. The display says 'injector fail', any idea what the fault is?
My BMW was misfiring recently, so I took it to my local BMW dealer. After diagnosis, they said one of the injectors failed and therefore all the four injectors needed to be changed, along with the spark...
I have bought a 2003 Skoda Fabia saloon which has done 130,000 miles. The car is blowing white smoke when starting from cold and smells when running and is sometimes a little hesitant when accelerating A...
My 2008 Ford Fiesta diesel broke down and a local garage did a diagnostic test and said injector number three needed replacing. I paid just over £300 for this work and the car drove out the garage exactly...
I have a 2009 Renault Clio 1.5 diesel and when I start it emits lots of black smoke. The problem has got so bad now that thick black smoke fills the road and loss of power. Any ideas?
You may be interested to know that my 2009 1.4TSi Golf has had a new engine put in it, free of charge. Despite the car being slightly over three years old, Volkswagen admitted "serious component failure"...
We purchased a 2009 Ford Fusion 1.4 TDCI in the summer for £5495. We didn’t take any extended warranty on the car, but the dealer said he would give us three months cover. A few weeks ago the car started...
I bought a 2009 Mercedes-Benz E-Class CDI Blue Efficiency two days ago and the engine management light has come on. I took it back to the dealer and they replaced the sensors for free, but the light has...