You're welcome. It would certainly be interesting to see leak results directly before and after a purge. I meant to do that myself but ran out of time. On the Diesel Purge video, I tried not to be too over the top about it and what it can do but it's seriously good stuff and you won't regret it. The difference is immediately noticeable and believe it or not, actually gets better over time. I think it's to do with the ECU adapting to the new flow rates. I've done maybe 10 cars now and the positive reaction is the same every time.

That's good to hear. Thanks for your comment.

kzfaq.info/get/bejne/eruddNybm9umhKM.html

Because it is a Euro 3 D5 and the replacement injector was the same Class as the other injectors, everything was plug and play with no software required.

Thanks for the comment. I got the kit from a Volvo main dealer.

@@sirobb Hi mate, is the mounting kit easy to fit?

wozzlepop Good tip. Can you tell me what pipes have to be plugged to stop air. the one on the end of fuel rail what about the other end of pipe that goes into pump?

The name of my seller escapes me but I know of several who have bought injectors from Huddersfield Volvo Breakers either direct or through eBay with no problems.

Yes. Look in my video list around 6 years ago.

Even with the fuel left in the tubing, they were all still well below 40ml, so within tolerance. The leak back variance can be caused by minute differences between the wear of mechanisms within the injector. Also, different amounts of carbon build up on the tips can affect fuel flow at the point of spraying into the cylinder. It's not realistic to expect every injector to wear at exactly the same rate so as long as the variance isn't too high across the board, the ECU can make +/- corrections to flow and ensure equal power is produced by each cylinder.

I would be very surprised if injectors are causing your vibration. Connecting even cheap diagnostics can give you info as to which part of the engine isn't running right. There's quite a lot that can cause your issue. Also you have poly bushes fitted, they will transmit vibration noticeably even on an otherwise sweet running engine.

I have a bit of a noise from gear box like it's the flywheel bearing would this cause vibration

Alan Tansey Yes it can. Hopefully it isn't that though...... £££££

Excellent. Glad it helped.

Scott Raven You're welcome Scott. Yes, 3mm is the I.D......about £1 a metre from B&Q last time I checked. At UK temperatures, failed glow plugs won't really affect cold starting if everything else is good so you're more likely to be on the right track with fueling causing an issue.

Hi Rob, ive just done the leak off test as per this video. Injector number 5 is at fault, it filled up to the 40mm mark in 1.15 second's the other 4 injectors didn't hardley put any fuel into the bottles so looks like they are all in very good condition. Now to try and find a good injector on ebay. Thanks again mate, you have been a massive help.

Scott Raven No problem and at least you have a conclusive answer. Is it a Euro 3 D5 (black engine cover) or Euro 4 (Silver/Grey cover)?

It has the black engine cover mate (52 reg), its on 126k with full history but its never had any suspension parts replaced so i have just bought engine mounts (after watching your "popping video", bottom wishbones, rear shocks and a service kit from Volvo.

Scott Raven There's videos for all of those jobs so hopefully they'll come in useful. When fitting the new injector, make sure everything is spotless and definitely fit a new copper washer. I bought a bag of these from Amazon which are the correct dimensions for the Euro 3 163 www.amazon.co.uk/gp/aw/d/B009NDBXVU/ref=ya_aw_od_pi?ie=UTF8&psc=1 On eBay, Huddersfield Volvo Breakers are an excellent seller and will hopefully see you right. Also on the Euro 3, check the injector classification and try to get one that matches the remaining 4 left in the engine. There's Class 1,2 and 3 identifiable by the last number of the part number on top of the injector.

3mm was the internal diameter on my poly piping but I don't know the external diameter. That obviously depends on the thickness of the lining. My pipe was from B&Q.

@@sirobb Could you measure the external diameter please it is probably more important than inner diameter.

Measuring calipers cost from £2 and are always useful to have.

@@sirobb I agree but would just like to know the external diameter so I can order the pipe.

Just measure the hole in the top of the injector instead. I don't have any pipe at the moment.

If you want, you can just clamp the return pipe after the number 5 leak off connection. It's nothing to do with the pump.👍

You always want more fuel available than is needed for when you increase speed or load on the engine so leak back within a certain tolerance is normal, 40ml in a minute on mine. A higher leak back or none at all indicates a problem.

injectors dont always use all the fuel supply therefore this uneeded fuel needs to be returned to the fuel system or pump

Yes thanks. Since posting that comment I have learnt how the injector system works. Clever stuff

James Barratt to answer the question that others have avoided to tell the exact reason. the injectors need to be lubricated as it a heavy moving parts. it has nothing to do with demand.

Aman A It makes no difference.

SiRobb Well it would make some difference. If the tubes are empty, the volume of fluid collected in the bottles would be less, as the empty tubes need to be filled with fluid first.

Aman A Ok, well let's look at your question another way. The purpose of the test is to measure what comes out of the injectors. Everything that is in the pipe has come out of the injector so I'm confused as to why you're asking. The reason I say it makes no difference is that you've given me no information about the pipework you're using so I'm assuming a pipe length and diameter that wouldn't really affect the results. As said in the video, you're looking for

SiRobb Thanks for taking the time to do the video and explaining

Excessive leaking injectors can be a cause of low cranking rail pressure so a good place to start.

J G Did you program in the new injector? If not, this needs doing on a Euro 4 either with Vida or via a main dealer software download.

Hi SiRobb, thanx for your quick response. The mechanic actually removed/cleaned and reused the old injector. I asked him about reprogramming and he said there was no need. But judging at how the car is vibrating , am having second thoughts.

About the main dealer software download, would you kindly send me a link? I will be grateful. Thank you

J G Here's an example of someone who changed injectors. www.volvoforums.org.uk/showthread.php?t=266822

Excellent. I inclined to to have the injector reprogrammed. that D5 Oomph is gone. Thanx for your help

If you have a a soot filter full message, you've either got a full soot filter or a misreading which can be caused by a faulty dpf pressure sensor. I suppose a poorly running fuel system could accelerate a dpf filling up but to be honest, you really need a proper diagnostic hook up and someone who knows what they're doing. Sensors and injector performance can be assessed in minutes with the right equipment. You might get lucky guessing and swapping parts but it can get very expensive quickly.

+SiRobb it has been hooked up but only showed "DPF restriction" no error codes ?? The guy said it was strange as there was no codes logged for anything else that explains limp mode. He reckons the vida reading and sound of engine gives him reason to recommend the injector test. Plus emissions are spot on and no sign of black exhaust smoke ?

+MrChristo1985 Your man could have performed an injector test there and then on Vida. Why didn't he do it?

+SiRobb he said they need to be removed and sent to an injector place to be compression tested. I had hoped my attempt at the leak back test would confirm a problem injector before I part with £100 to have them compression tested

+MrChristo1985 he also stated that injector 1's read outs on vida weren't quite right

Cold as that's when an excessively leaking injector causes the most problems.

@@sirobb thanks again.

Darren Powell Nothing because you're collecting the returned diesel from the injectors in the bottles.

There will be some kind of fuel return built in to them so I don't see why not. I don't know the flow figures though.

@@sirobb thanks for the quick response.

Inner

Those damn adverts mean that you pay nothing for the great advice in the video. I can also guarantee you that I spend a LOT more time making and editing the videos than you do watching the damn adverts. 👍🏾😊

4 or 5 do seem to be disproportionately more likely to be the ones at fault and I've no idea why. 😊

@@sirobb probably firing order

Yes. One bottle for each injector.