How To Test Diesel Injectors Leak Back Test Part 1 Bodgit And Leggit Garage

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How to test a diesel injector
Siemens injector part 1
How to do a leak down injector test
We are going to be doing this series on how to test a diesel injector using different tests different equipment to show you how to properly test an injector there's more than one way to skin a cat but you do have to be careful some tests as we show can lead you in the wrong direction
In this video we show you how to do a leak down test of an injector
But also be aware as we show in the video just because it passes 1 test doesn't mean the injector is good

[@martinguitarhd28]

Good to see some diesel vids and testing methods.Thanks for posting Leon.Always enjoy watching.

[@bodgitandleggitgarage]

Thanks mate

[@ousmanesarr7287]

Love this video. Very good tips. Please keep the diesel videos coming. Helping me alot.very informative

[@bodgitandleggitgarage]

will do mate glad them help you

[@EXOVCDS]

Nice kit! Looking forward to seeing part 2.

[@bodgitandleggitgarage]

I hope it made a lot more sense this time to you I know you was looking for this video

[@EXOVCDS]

Made sense to me... gauging the return flow can point to a fault with an injector. As with anything, the more / different tests that are done, the better the diagnosis.

[@125sm3]

Great video, looking forward to the next one .

[@bodgitandleggitgarage]

Thank mate

[@samuelbolanle1994]

Hi Biodgit, thank you for this video, it saved the day for me. My ranger 2.2l injectors sprayed today after a long battle trying to fix it. One of the 4 injector actually is faulty, prevented the rest from spraying consequently of course the vehicle couldn't start for months.

[@MalcOfLincoln]

Always impressed by your knowledge Leon 😊

[@bodgitandleggitgarage]

Thanks mate

[@johnharris6691]

So is he!

[@armandonika]

Sortedddd This was a cool video mate cant wait for part 2 Cheers

[@bodgitandleggitgarage]

Thank mate

[@Krillekris]

This is great. Learning new stuff :-)

[@bodgitandleggitgarage]

Thanks mate

[@connorgale5049]

Love the vids is part 2 up yet? Cheers bud

[@mertonmarine878]

Nice one. Thanks guys...

[@vdubs6068]

Great vid Leon 👍

[@bodgitandleggitgarage]

Thanks mate

[@keitho77]

This is going to be a great series. Nice one Leon.

[@bodgitandleggitgarage]

thanks mate

[@jamarialfred1360]

a trick : watch movies at Flixzone. Me and my gf have been using them for watching a lot of movies these days.

[@orionhenrik3439]

@Jamari Alfred definitely, have been using flixzone} for since december myself =)

[@ozzstars_cars]

Nice one Leon.

[@bodgitandleggitgarage]

Thanks mate

[@nemocap2958]

Finally!Informative video about Siemens injectors!Nobody wants to deal with this guys!Are they that bad?Thank you.

[@cesarjorgemurillobarientos1813]

very good master

[@JoeNunes345]

Great info Leon. When you say that all the injectors will be switched off on newer cars, from what year approximately did that strategy start? The same thing also happens on Denso injectors that come with their own short 6 cable wiring harness. They are used on Toyotas Hilux in South America. Many thanks, Joe

[@ThomasRabber]

On Ford you should do the five minute test. Starting with the cold engine. 3min warm up 30 sec rev on 3800 30 sec on idle 30 sec rev on 3800 30 sec idle After this you should have with good injectors about 25 ml leak back. This is the right way to do the leak test.

[@bodgitandleggitgarage]

I see you are back making really nice comments on my videos again so nice to see you back I love reading all your comments thank you so much for commenting I've got lots more videos you can Comment on really appreciate it Go and look at some more it will give me more Money And when you watch a few more my videos I'm sure you will learn how to do things properly

[@bubbs2010]

Great vid as usual - sorted :)

[@bodgitandleggitgarage]

Thanks mate

[@simonrawle7885]

first lol love diesel vids, ive been chasing a intermittent fault in my car for the past year . so intermittent its hard to catch

[@bodgitandleggitgarage]

Yes mate they are the hardest but with the next Test on the solenoid I will show how to find intermittent faults

[@peterfriel5129]

Damn, wish i was a young apprentice learning from Leon the master !!

[@bodgitandleggitgarage]

LOL thanks mate

[@bodgitandleggitgarage]

Yes I am a master master bater😁😂🤣😂😁

[@meknownothing]

Wish I new this a yr ago I had a mondeo 1.8 tdci which did not start would run up on easy start no problem but not run on its own. I was told all injectors had been serviced by a diesel company. It turned out to be a naff injector which caused it not to start engine malfunction message on screen in the car . Thanks for the video (sorted)

[@bodgitandleggitgarage]

Glad you enjoyed it mate thanks for watching

[@meknownothing]

@@bodgitandleggitgarage love your video's very useful as im in the.trade myself and as ive found with this video you came across a issue I had hope it helps others.

[@MrGodsking]

fantastic video wish you could fix my ducato jtd

[@bodgitandleggitgarage]

I can😊

[@clocksigns9755]

Leon is a Lion

[@bodgitandleggitgarage]

Boom

[@Pera-Peric]

*For freelander td4 2004 diesel 2.0 bmw engine need programing injector or no. ?* Thank you

[@tonyconnolly2897]

Great video as usual. Can't wait for the next one. I've cleaned loads of petrol injectors and it's always worth while doing it. The difference can be vast. Would you recommend cleaning deisel ones? And if so, how would you do it or are you better off leaving them with a shop to do them?

[@bodgitandleggitgarage]

Hi mate thanks a lot for watching I have some videos on how to clean diesel injectors with Sonic cleaners but you do have to be careful get the right chemical do not put too much in you will damage the valves and the springs and the tips of the injectors

[@Iblac]

hi mate, what is the right chemical to use ..?

[@user-so7uh5fy3p]

thanks for the great videos you do..i have a code p0251 on a ford transit connect 1.8 tdci,it cuts out intermittently when accelerating . on the leak back test i have loads of air bubbles in the pipes is this right ?

[@peskyparttimers8239]

What happened to part 2? I have an intermittent poor running issue on a euro 5 Puma 2.2 diesel. Leak off test was spot on, all the same level so suspect an electrical issue but no codes or engine lights.

[@andrewallen9993]

Intermittent problems are what separates the amateurs from the pros!

[@jessekorhonen4268]

Hello, my MB 200cdi leak is 35ml/2min idle. is this too much and what is the allowable leak in 2 minutes?

[@kirwanjohn101]

Is injector no 1 not the worst here? Is it clearly higher than 2,3 or 4. 1 and 4 appear to be bad.

[@jix177]

11:30 there seems to be a bit of diesel dribbling steadily around injector 1 - or was that just left over from where you had clamped the return pipe as you had said? Thanks for the vid.

[@bodgitandleggitgarage]

Hi mate it's just a bit of diesel when I was obviously disconnecting reconnecting the pipes and from the return pipe from the vehicle

[@Diagnosedan]

First Boom!😉

[@bodgitandleggitgarage]

BOOM BIG FAIL haahahahahahahahahah

[@NaveenKumar-xb7gk]

On my skoda Octavia 2006 model i did not get any fuel return from return value on injuctor whats tha reson plz help me

[@frontlinemedia4270]

Here's another question. What is the thread size on a fuel rail and are there caps available?

[@bodgitandleggitgarage]

just buy proper kit you get everything in it job done

[@mantass7094]

Ford is scrap not easy to find problems sometimes, but great video👌

[@bodgitandleggitgarage]

Thanks mate

[@hughjarse4627]

If I can give anyone any advice it would be to avoid any 1.6 vag engines from 2009 onwards

[@martinp907]

I've got p0087 code on a 1.4hdi peugeot. I've done filter and pressure sensor on the manifold Been told to do a leak down test as could be faulty injector.... Have u ever come across this before ? This is also an intermittent fault 😫

[@malcolmyoung7866]

Leon, my very basic leak back test kit works fine but you are correct in saying that you get what you pay for....How much was that Lazer kit, BTW?? V10 diesel...VW Phaeton and Toureg have 'them thar injins in 'em....'....and when I first did my daughters Freelander I didn't clamp off the return pipe...it was messy...but the engine was 'gleaming' afterwards..

[@bodgitandleggitgarage]

Hi mate yes I know them vehicles do have big diesel engines but what I meant was we don't see them here in Ireland I don't think I've ever seen one even driving around the tax is too expensive here for vehicles like that

[@malcolmyoung7866]

Ahhhh, of course that would explain it brother.....just stupid if you ask me but as ever a great video...

[@CK-fn6zs]

Can you do this leak off test on all CRD injectors? I think some injectors are high pressure return and this test must be avoided on these types of injectors. Some CRD injectors have bolt on solid pipework on the returns. I think these may be high pressure return. Whereas some have simple clip on plastic or rubber return pipework. With this type I presume they're low pressure returns.????

[@thebiker2655]

What's the best way to find a leaky diesel injector. Car isn't hard to start lots of white smoke smells of diesel done a chemical test and pressure test for head gasket I believe it could be a bad ECU driver causing it to stick open I don't have a lab scope to check the dwel time in relation to the other injectors

[@bodgitandleggitgarage]

Hi, mate, one of the easiest ways to do it is to block off an injector 1 at a time. If you watch some of my latest videos on the Volkswagen, you will see I do this. There is a little tool you can buy. Or you can make your own from an old. Injector feed pipe And then simply block one-off at a time. See how easy it is to start and see if the white smoke stops.

[@nemocap2958]

Hi Leon,can I ask for your opinion about adding 2stroke oil in to diesel.Any good or pointless?What about diesel quality in Ireland?Cheers

[@bodgitandleggitgarage]

Hi mate I always say get the best fuel you possibly can and I always say it's always handy to have some oil in your car because if you have to go to a place you do not know or if you just happen to get a dodgy tank of diesel you can always add the oil this will save a lot of damage but will make the car smoke but at least it will save damage to injectors and the pump

[@nemocap2958]

Thanks Leon!Usually I use Circle K, former Topaz.The question what is the Best fuel in Ireland?!

[@martinguitarhd28]

Leon can you use those bottles for testing leak back on piezo injectors? Cheers

[@bodgitandleggitgarage]

Hi mate the injectors in this video where piezo injectors on a common rail system

[@martinguitarhd28]

@@bodgitandleggitgarage cheers Leon for reply.always love you're videos.

[@bodgitandleggitgarage]

@@martinguitarhd28 anytime mate glad you like them

[@comeinhandynow]

How much diesel leaks back? In ml per second please. What is a good number?

[@bodgitandleggitgarage]

Hi mate I bet there is a speck out there somewhere but I don't know anybody who knows that you don't need to do it that way you don't need that particular number you have to wait to the bottles around 80% full and you go off the one that is filled the least anymore that is filled 10% more they have failed the test

[@everythingeverywhereanyone]

What if 2 injectors don't fill at all.

[@DavidSantos-vl4tc]

Can't find part 2 3 or 4...

[@jackjennings8414]

where are you located

[@ruztyruzz2313]

What about when there's no fuel coming out? not a single drop

[@swarajjoye]

Great video. I have a code P1263, cylinder 3 high to low side short. - short circuit to positive -current. I personally don't think it's the injectors itself. I think it's a wiring problem. Have you ever come across this particular code. I yet have to check all the wiring. Let us know please. Thanks

[@bodgitandleggitgarage]

Hi mate you're going to have to check the wires between injectors and the ECU

[@swarajjoye]

@@bodgitandleggitgarage Done resistance check on injectors, cyclinder 3, has extremely low resistance to the other 3. Check all wiring voltage, getting the required reading. Wiring loom is new, 2 years old. Changed the whole engine wiring loom and ECU , then programmed by Ford. Car had been running for the last 2 years or so without any problem. I'm going to check all wiring tomorrow, between ECU and injectors. And we'll take it from there. Thank you very much. I'll keep you inform.

[@swarajjoye]

Checked all the wiring, from Injectors to ECU, And checked each and every connection. They were all fine. So I got a genuine Ford Injectors second hand. Replaced injector 3 and voila, Bob the uncle. It works. Didn't have to programme/code to ECU. plug and play. Everything working fine now. Many thanks for your help. B

[@bodgitandleggitgarage]

sorted

[@yachtmustang]

Any advice on finding an intermittent fault - think it could be a faulty solenoid on one injector but don't know how to find out if that's right and if so which one

[@bodgitandleggitgarage]

Hi mate, intermittent faults are the worst of find an oscilloscope is your best friend. That will find it for you.

[@yachtmustang]

@@bodgitandleggitgarage Thx bud. Thought I'd try your tip with a magnetic field tester to see if there's no field when its playing up. At least that will tell me which injector it is. Thx for the tip

[@bodgitandleggitgarage]

Hi mate, unfortunately that won't work if it's an intermittent problem. It will happed so fast that only a scope will show it.

[@yachtmustang]

@@bodgitandleggitgarage Hey fella. Do you have any vids on how to do this. Given it is intermittent, how will anything show up on the oscilloscope unless it happens to misbehave when the oscilloscope is hooked up

[@SteveRobReviews]

This test was tapped into each injector return fuel port - yes , Leon how much is a new factory injector ?

[@bodgitandleggitgarage]

7:31

[@bodgitandleggitgarage]

I cannot remember the price of the injectors but they are a stupid price I've never ever brought a brand new one I've only got the reconditioned

[@SteveRobReviews]

bodgit and leggit garage Return pipe install yes but you had to pinch a line off or shut it , bloody confused me mate , your Gallic throws me off eh 😂😂

[@bodgitandleggitgarage]

@@SteveRobReviews 10:51😁😁

[@SteveRobReviews]

@@bodgitandleggitgarage Get Stuffed 😅😅

[@user-md1ep5pg3r]

My zd30 is not starting. I have checked all fuses but still not starting. I have checked diesel from injector to injectors it's ok but l cant find power to injectors

[@user-md1ep5pg3r]

Hie Leon can l get electrical diagram for zd30 comon rail injectors

[@matsilelebaloyi8344]

Where did u connect those pipes?

[@bodgitandleggitgarage]

On the return of the injectors

[@v8berenguer372]

👍👍👍👍👍👍👍👍

[@bodgitandleggitgarage]

🤗🤗😜😜👍👍👍

[@stojanhumar1704]

Do you need to check back leak test at cold or hot engine?

[@bodgitandleggitgarage]

I always do both but sometimes you cannot if the car doesn't start it just depends on the conditions

[@stojanhumar1704]

@@bodgitandleggitgarage Thanks for the answer. Are 1.8 tdci engines with chain made in year 2007 good engines? Do they have any problems with engine bearings?

[@bodgitandleggitgarage]

@@stojanhumar1704 hi mate not that I've heard of but it's like anything if you look after your engine change your oil every 3 to 5000 miles you won't have any issues

[@ThomasRabber]

On Ford you should do the five minute test. Starting with the cold engine. 3min warm up 30 sec rev on 3800 30 sec on idle 30 sec rev on 3800 30 sec idle After this you should have with good injectors about 25 ml leak back. This is the right way to do the leak test.

[@maximolotov]

can you do 1 injector at the time please ? One my injector filled bottle in 10 seconds so i cant carry on testing remaining 3 .

[@bodgitandleggitgarage]

You can just replace one injector at a time but it's not really recommended in the perfect world it's best to replace all 4 but obviously this is very expensive so do whatever your budget allows you to do

[@maximolotov]

@@bodgitandleggitgaragety but That was not the question Can you leak of test 1 injector at the time ?

[@bodgitandleggitgarage]

@@maximolotov If one of your injectors fills it that quickly then it needs to be replaced no point going any further until you do that 1st

[@maximolotov]

@@bodgitandleggitgarage The plan is to find out how many need fixing and then send them to be repaired. No good doing 1 at the time and waiting 3 times if 3 are gone

[@bodgitandleggitgarage]

@@maximolotov Like I originally said best to replace all 4 no matter what if one of them is gone the Rest have done the same mileage and they are on their way out

[@JamesAllen300]

Leon, i've got the 2.2 tdci 155 BHP in my mondeo 54 plate. I've seen on several places that they say with these injectors that you have to test them when the are at full engine operating temperature and go through different engine speeds to get a proper leak off results. Why are there so many different ways of testing diesel injectors and which ones are correct? Does it depend on manufacturer of the car or type of injector? www.fordwiki.co.uk/index.php/Injector_Leak-Off_Test The test condition i was told to follow are in the link below and it says that this is the Delphi test method as they are Delphi injectors. this is why I get so confused with the lack of direction for testing injectors. Is there a right way or wrong way? Is it a "One size fits all" test?

[@bodgitandleggitgarage]

Hi mate the only real way to test injectors 100% roperly is to take them off and gave them to somebody with the machines to test the flow back pressure everything what this test Does It just gives you a quick indication of what's going on believe me this test is good enough to know that your injectors are damaged I will be doing another video and how to do if your injectors are leaking into the cylinders but like I said this is good enough to know if your injectors are ok or if they have an issue this is just a quick and easy test to see if there is an issue no matter what anyone says it's good enough the next step is to take them out and get them reconditioned

[@frontlinemedia4270]

What part of the injector is causing the fuel to leak off? Don't say internal seal? I want know what internal part?

[@bodgitandleggitgarage]

it's not a simple answer you obviously don't know what goes into them very special check valves special rotary valves special injectors Springs ball bearings they are so complicated it could be 101 things causing it to leak back impossible to say until you actually strip it down and see what the actual issue is with the injector you happen to be testing

[@frontlinemedia4270]

@@bodgitandleggitgarage I have them all apart at the top and bottom...as far as I can tell the middle is just a tube for delivery b/c it has to reach the cylinder. My guess by looking at it, it's the check valve at the top, which is a small ball bearing and a cup, and of course the concave orifice in the center. Yes or No? Ppl build these things, not aliens from another planet. Someone has to know? ?

[@frontlinemedia4270]

@@bodgitandleggitgarage I can't even get someone to tell me the voltage and amperage which is used to get an injector to pulse. Crazy!

[@bodgitandleggitgarage]

@@frontlinemedia4270 it will be absolutely impossible to tell with your eyes the only way to really check injectors is put them on a special flow test machine which cost thousands of pounds that's why you have to go to the people that really know what they are doing you will not build to tell with your I then micro where that is in the items just get them repaired properly by professional

[@bodgitandleggitgarage]

@@frontlinemedia4270 all depends on the car in the injector can be anywhere from 12 volts to 500 volts depending on the car depending on the injector depending on the engine

[@frankgrimesjunior1645]

What did you say from when you started talking to when you stopped talking ,the audio is dreadful.

[@bodgitandleggitgarage]

Hi mate my apologies that was an old video my audio has come a long way since then we all have to learn and start somewhere

[@alanssnack1192]

i recognize those eyes i think they are from poland or romania.

[@docpug6861]

why is this kit so expensive??

[@bodgitandleggitgarage]

It's like everything you get what you pay for when you buy the really cheap Chinese kits all the little connections leak they are terrible you want to do a job properly you need proper tools

[@HarleyN93]

stay away from cheap gear pulls out a laser tool...

[@colinwoodward3901]

kick back