Any diesel injector experts on here?

Mr K said:

Hi
I took my injectors to a local tester, attached are the results.
The report shows (last page) they are all under fuelling and the leak back is high (so I'm told), so I'm now thinking about replacing them but it's not a cheap job.

The car runs fine but I wonder if a new set of injectors will improve the running and overall performance, I don't want to fit new ones and find there's no difference.

Is there anyone with good knowledge that can read this report and say by how much these 2 issues are and is it worth replacing them?
Thanks

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ER1C said:

You dont need to replace them, you can recondition them and swap the nozzles for 150 ish. A lot cheaper than true new injectors. I did the same about 8 years ago.

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Mr K said:

Thanks but I'm struggling to find recon kits.

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ER1C said:

You wouldn't do it yourself anyway, its complex and needs testing. Any injection chap will have the nozzles. Once fitted they need testing at very high pressure. Your only worry would be getting them out which is simple enough.

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Mr K said:

I had taken them out hence the attached report, the are now back in the car.
The guy that tested them said the recon kits are no longer available.

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Ian M in France said:

If the car was running okay why did you take them out ?
I am always a bit unsure of the results, know lots of people who have had a problem, had the injectors check, told they are f##ked changed them all and that was not the problem, the question is not if they are to spec but how far out of spec can they be and not cause any problems?

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Mr K said:

I took them out to get them tested, I want to know if they are ok or on their way out, proactive maintenance.
The engine is a bit noisy so could be diesel knock and I want it running at it's best, just because it's running doesn't mean it can't run better and smoother.
"the question is not if they are to spec but how far out of spec can they be and not cause any problems" that is my exact question, I am trying to understand the attached test report, are they a long way out of spec or only a small amount?

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ER1C said:

Injectors, DIY refurbishing?

Hi all... Having just completed my most recent project, I’m posting the complete process of how I went about refurbishing a full set of Injectors for my Freelander, 2006, 3-Door, Diesel Td4. The first picture in the series shows the tools I used, the most important being the 10mm hexagonal...

www.landyzone.co.uk

Above FYI.

No idea on the report... .tbh I would expect the expert who charged you for the report to tell you if you need to replace them and the usual "what would you do ? "

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Nodge68 said:

If it ain't broke, don't fix it.

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Mr K said:

Injectors don’t just stop working, their performance depreciates over time as they wear slowly, they might seem ok but only be 70% effective and I want this engine running at its best.
I’ve already upgraded the Intercooler and had a remap, seems daft to do this work and not check the injectors are at their best.

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Nodge68 said:

Er, injectors do just stop working, most people don't notice a slight drop off in injector performance until they fail. You said it runs fine, so it's unlikely to improve much with new injectors.
If you're concerned that the injectors aren't functioning at optimum performance, then buy a set of new ones, as reconditioned are never as good as brand new injectors.

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