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Intermittent overrun rattle - completely separate from engine activity. No effect on revs. Sounds like another little diesel engine doing its own thing. Engine performamce readings on testing equipment are normal. Anyone got any ideas?
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does it sound random but like noisey tappets ? I have heard similar on a couple of other diesels on the overrun & wondered whether its injectors leaking fuel causing combustion.
perghaps some can expand?
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Yes, it is similar to your description and injectors have been mentioned before - not sure why/how they should be leaking fuel though. It seems to make more sense, because it can be described as an activty separate to the engine turnover
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Problem solved! Specialist Diesel Engineers recognised this problem with the X Trail and also with some Toyata diesels. Seems that it is caused by the solenoids managing the fuel feed don't shut down when you take your foot off the pedal. It allows excess fuel into the injectors which continue to operate.
Seems like the problem is more common with cheaper fuels (less lubricant) and can be assisted (cured) by liberal helpings of quality fuel additives. Garage posted on the recommended Garages site
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Thank you for the update. It was as i suspected. I have a friend who has the same problem so will get the injectors checked.
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(less lubricant) and can beassisted (cured) by liberal helpings of quality fuel additives.
That's very interesting, are you now destined to be a Millers/Forte or similar user for the life of the vehicle, or will buying premium fuels suffice?
Was there any repair performed or just the additive cure?
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