I have a 1.5 XND Diesel (105,000 miles).
The car runs fine until it warms up (after 10 mins or so) and then there is a knocking sound from the engine as i accelerate in
Could be pre-ignition caused by a carbon build up.... You tried a decoke treatment?
Is that easy to do John? cos i'm a bit of a novice....
Yep....just go to a car accessory shop and ask about decoke treatments. You usually squirt them in the sparkplug/glowplug holes, leave to soak overnight and then fire it up (before it get light :-) the following morning.....when the fog clears its done!
Might be a red herring though....I'd hang around for a bit for a second/third opinion.....
try and give it a clean out ,with carbon cleaner.can buy it at any place nowdays.
The other approach is to put some injector cleaner in the tank, then go and find a quiet bit of road, and (assuming that the cam belt is not past it's sell-by date) drive it flat out in second for 20 seconds or so. Put your foot to the floor and keep it there. You will see smoke in your mirror to start with but it will clear. Otherwise known as an Italian tune-up.
Why put some injector cleaner in the tank just add the whole bottle.cant do any harm. just smoke like some of the buses round here. Chris from Addlestone Surrey.
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