basically, the previous owner bought it as a non runner for his dad, apparently it had an injector fault and replaced all 4 as a set. i then purchased it and after a while had a problem with number 4 injector ( was misfiring and smoking, struggling to start) so that got replaced under warranty. i had the carbon cleaning done as a bit of an impulse thing, i saw an advert online, someone local to me was doing it at a discounted price as hed had a cancellation, so thought id give it a go.
then last week or 2, similar symtoms as before started to develop (clattering noise, smoke, struggle to start, felt like it was running on 3 cylinders) so i bought a leak back tester and found injector 1 was returning more fuel than the other 3. so as the injectors are still under warranty, contacted euro car parts and they agreed to replace it. it now runs right again but there is still a slight noise. no smoke or difficult starting though.
hope that make sense
Makes sense now
The injectors are supposed last about 100,000 miles. Presumably a duff one was supplied.
The clattering is a pretty normal common rail noise, to be honest. The ECU will take about a tank of fuel to adapt to the new injector