Wasn't me!!could be either but try chucking some cleaner direct into the injector first (think saint V8 or someone had a thread on how to do this recently)
The M57 is a common rail high pressure direct injection engine, basically the same as any other "modern" diesel.If you want a cheaper version of injector cleaner that also helps in cold weather, add petrol. It'll clean the injectors nicely, as the engine in the early L322s is still quite an unrefined derv you can get away with a healthy amount of petrol without doing damage. A more highly strung newer engine will throw it's toys out of the pram. You could probably get away with 6-8 litres without drama.
I know a lot of guys who run with a small amount of petrol at all times. But once a year always seems sufficient for me. If the injectors are clogging fast enough that you need to clean more often, you've got bigger problems. One could argue you should never need to use injector cleaner if you drive a derv correctly. The clogging is usually caused by stop/start traffic. Get it on the open road and blast them clear.
The tolerances are a lot finer on new engines though, I'm not sure how well they'd handle the thinned lubrication by adding petrol. The M57 is still quite agricultural in design.The M57 is a common rail high pressure direct injection engine, basically the same as any other "modern" diesel.
Put a fivers worth of petrol in with £50 of diesel- couple of runs later she seems a lot better- still a bit lumpy on start up but much better. Will see whether it improves further.
Out of interest- Can anyone explain to me what the pre-heater does? Is this some kind of Webasto type diesel heater under the car- what purpose does it fulfill? Sorry to be silly!
so what does it actually do- does it heat the internals of the engine or the fuel system? Or does it give the cabin ventilation a head start on warming the inside?
And does it start from unlocking the car or turning the key? Can it be configured to start on the button- would be bloody handy atm!