Testing your Diesel Injectors

[@TonyCurtis-oc3hp]

Many thanks for this info . . .Finally sorted a 'P2149' issue with the Vivaro that it would cut out after a couple of seconds. . . Disconnected the injector 4 connector and the car started and ran on 3 cylinders . . Eureka!! Then tested the 'new' injector connections. . only 15kohms and connection to earth . .!! . . bad injector!! . . .Great info.

[@ColinCuthbert-k77]

Top man I own a garage been mechanic all my days but learning daily many thanks 👍

[@mohammedazaroual5925]

Great thanks for you brother, ,showing us how to test injectors.

[@studiosys]

A good idea is to have one test lead with a croc clip , that will allow one hand free , or stick in in vice

[@ricodinero4926]

thank you sir, why cant people upload vids like this, right to the point.

[@carlluscombe4011]

Great video , thanks for taking time to make and share, this video has given me confidence to test my own now. Thanks Again

[@cejs3273]

😂 LOL 3 years later and i ❤ it thanks ! 😊

[@stranraerlad1]

Nice clear video thank you, my problem is if I have been a run say a any where above a mile when I switch the engine off after the run there is a screeching noise which goes on and off for about a minute , if its only less than a mile there is no noise, the car is running fine, have you any idea?

[@dieselhead24]

Thank you, sir. Two of mine were 500k and 22.5k. Both need replacing I'm guessing.

[@greg1158]

Thank you very much! I"ll test my injectors asap this way. My issue is, the engine suddenly starts knocking out of nowhere while accelerating, but only few times, not always, actually pretty rare, but I can hear the fuel is not burning well. But when I stop the car the issue is gone. I hope this test will bring me closer to the reason.

[@darkocalusic3985]

My uncle had the same symptoms in the car and one of the injectors were bad. Idle was ok and when accelerating, knocking could be heard. Like I said, only one was faulty but he ended repearing all 4 of them and now everything works fine. He tried also some fuel additives before reparation but those didn't help.

[@greg1158]

@@darkocalusic3985 Hm, that sounds good, thanks for the infos! I already sent my injetcors to measure the flow, they said they are fine...I'll not use any additives thats for sure ;) What car has your uncle? Mine is a Hyundai I30 1.6 crdi.

[@darkocalusic3985]

@@greg1158 he's got skoda 1.6 TDI 2011. But, I'm begining to notice rough idle when the engine is cold in my passat b7 1.6 tdi 2011. I think it's due to siemens injectors..

[@greg1158]

@@darkocalusic3985 uhh :/ its not good. Maybe just the EGR valve is full with carbon. At least I have no idle issues, yet...

[@darkocalusic3985]

@@greg1158 I've checked it with VCDS and indeed, there is significant ammount of injector fuel deviation when the engine is cold.. when it gets warmer, everything is fine. So, I think it's up to faulty electronic in injectors. I have an appoitment for checking it at Thursday and we'll see how it goes :)

[@edwinlacosta4285]

Thanks for sharing knowledge sir.very impormative.

[@peterogestad6184]

Hi. Great video. Can I test this while they are still left in the engine or do I need to take them out?

[@noexfil4u643]

you can test in the engine

[@OneWay_KYM]

Hello , do you have any solutions for failed edu driver ?? 1kd engine specifically ​@@noexfil4u643

[@tinashescorpion8454]

I have Ford everest model 2011 diesel engine 3 ltrs it doesn't start until you spray it and it smokes please advise

[@barhoa]

Check the back leakage of injectors by removing the return pipes. One or more injectors will have more back leakage than others.

[@martinakoto6907]

Thank you for sharing with us.

[@barrykavanagh46]

Excellent bit of info. Any chance you have a video of a complete over haul of a 2006 Vivaro 1.9 fuel diesel tank clean, fuel line cleaning, priming the fuel system after that and bleeding all air out? :)

[@markcoe69]

My 2011 DV6 had 3 at 195 and 1 at 400 with DTS’s. Test confirmed. Thank you very much.

[@pieterbuys1336]

can you replace parts on these injectors eg magnet coil, springs or tips.....

[@wilki61]

So helpful awesome thank you

[@paterix79]

good stuff! greetz from Poland!

[@piecetoyou8285]

Hi Martin Firstly thank you for illustrating how to do a resistance test, I own a Ford fiesta car TDCI 1.4 2008-2012 model 3 door I think its a duraTorq engine, what injector do they take and how many ohms should be reading on the injector while on the bench

[@MrLilygreen]

Best to contact your local diesel centre as I am not 100% sure on the figures as a lot of the injectors give different readings , if you can't get the information let me know and I shall contact mine

[@piecetoyou8285]

@@MrLilygreen Hi Martin unable to sort it at moment

[@paulevans4021]

@@piecetoyou8285 I'm about to do my 2 1.4tdci fiestas.... what numbers did you get, I'll test one set of mine too tomorrow.... we can compare notes.... I'm in west wales so wouldnt know who to call for numbers,

[@paulevans4021]

on my 2008 1.4 they all measure bang on 200 k ohms

[@piecetoyou8285]

@@paulevans4021 I just bought secondhanded injector they said taken out of a fully working engine, when I measured the resistant's it showed .004 ohms so I guess the top part of the injector is crap, don`t see how this was out of a fully function engine. Thank you for giving me the ohms that should be showing,

[@karlsillett]

Thank you for this video, just have a question, bosch injectors off a 2001 sprinter 2.2 , doing your test i dont get that resistance on any, i Get 00.0 when meters on 200kohms and 00.4 when meters on 200 ohms. Any advice would be very much appreciated. Thank you

[@ab_o]

Hello, are the wires of injectors coming from ECU to injectors positive or positive and negative electrodes? It has nothing to do with the negative (ground) motor pole. I have a Hino with a J07E 5-cylinder engine, I think the type of injector is from Denso, the engine does not work because the injectors do not secrete diesel (electric problem)

[@toyotoe3732]

Hi . Thanks for video. Golf mk6 1.6 tdi CAYC. Hunting idle issue. All injectors showing 200k ohms between pins. No codes in ECU. Is it possible for injector to be on its way out and not flag fault code? Cheers

[@sweeneyaaron9766]

Should I get those reading on a 2012 passat 2.0tdi I have code for all 4 injectors open circuit and did resistance test and got 0.7 ohms on all 4

[@mustafasaidam]

Hi martin thank you for your explantation I have skoda fabia mk3 tdi 1.4 does the reading give same to these injectors Waiting for your respond

[@MrBlaugeist]

I think them should show 200 plus

[@ekrikakemebradikumor7331]

Very informative🎉. Does this test method applicable to all injectors please?

[@southwestinjectorremovals8932]

It's only for piezo injectors

[@ekrikakemebradikumor7331]

Thanks for the response. I am having challenge with testing the resistance reading after watching this video repeatedly. My readings as always been 0.00😢. What am I not getting right please? (1) What does a zero resistance value mean, 2) what is the acceptable resistance value for a good diesel injection and 3) what is the right ohms position to set on my multimeter? Thank you

[@johnmsemes1507]

Hi, thank-you for showing us,this a good video, I want to know if you have an injector has 6 way pins, how do you test with injector tester ? Like 1GD injector, has 6 way pins male pins.

[@MrLilygreen]

Honestly I have no idea , keep searching you will find the answer somewhere

[@train4905]

Exellent sir.very helpfull. Thankyou. Keep up the great vids.

[@paulllewellyn2269]

well done, very good, how about how to clean nozziles etc. paul Llew

[@BrainXTV]

Great video and very good explanation.

[@Wolphypwi]

is this applying to the urea injectors too?

[@ClankyRochet]

Any chance you could make a video of how to get to the injectors, please?

[@Planefix1]

Excellent video, thanks

[@grippingyarnsuk]

Thanks . Can you do that with it in the car ?

[@southwestinjectorremovals8932]

Yes you can.

[@johnmcguinness7116]

The 1 I took out is showing .8 I ordered a used 1 its also showing point 8 am I using test meter wrong or is mine just a cheap meter

[@normanrussell5526]

What is the best way you would recommend to clean the injectors. Would using one of the propriety cleaners that you add to the diesel fuel work or is there a better method.

[@southwestinjectorremovals8932]

We use 4tech fuel system cleaner with good results.

[@saineyjobe9056]

Thank so much... I've learned that 👍👍

[@superjob7816]

Hi really good vids iv a 2008 Viv iv no lights on the dashboard but it's running lumpy any idea cheers

[@nateryan7041]

Do the have to be removed to test the electrical side of them ??

[@MrLilygreen]

No you can test in place

[@lancewalsh-norman9658]

Hello I was just wondering does the same apply to Volkswagen PD130 engines with the injectors still in the car, Any advice welcome thanks

[@webpro607]

you should also check the capacitance (farads)

[@izanami6345]

it works for siemens injector or no this test

[@Manuqtix.Manuqtix]

Are you not going to check spray patterns? Leak tests and pressure checks?

[@MrLilygreen]

I have a guy who does that for me if they show an issue when I do a leak off test

[@MrLilygreen]

I just bought a test rig to do that so will post a video of that soon

[@ianwilkinson5549]

Thank you for that excellent video and well presented sir.

[@Boz777Kurt]

Very informative. Thanks.

[@philip.aocallaghan4602]

Great video. I have a car I have replaced the same injector 3 times. Before installing the injector checked as you have done, perfect reading .. injector lasts a few days to a week ..test it again, bad reading.. install another same story. totally baffled .. Any advice very welcome

[@MrLilygreen]

You could have an over power pulse issue, the ecu should regulate the power pulse going to the injector I think you would need to take your vehicle to a diesel centre and get them to do a I depth check .

[@Carlostrowbridge]

save me lot time and money thank You for this nice video.

[@BLahBLahBLahBLah584]

Would you get a fault code if the injectors are clogged? I get a reading of 180 on all 4 injectors

[@avianfish8732]

Hi there I just tested all four of my injectors on the 1.7cdti they measure 0.8ohms each with no ground leakage. I was worried as they are nowhere near 180. But they are all the same exactly. Engine runs. I have a misfire and difficult starting when hot.

[@southwestinjectorremovals8932]

Hi the video is only a guide and primarily is for je piezo injectors and the solenoid injectors like yours do work on different resistance. 0.8 sounds about right to be honest

[@LinoLaddr]

Can you cnage the the faulty electric part of the injectors and make it work? Can you find parts?

[@southwestinjectorremovals8932]

Potentially you could, but I've never tried it myself.

[@j4ffj]

Where are you based please I'm in South Wales please

[@Balajis_Mart]

I'm having trouble after servicing the Nozzles. Engine runs for a few miles and stalls. I found leaks in seals. Replaced it. No leaks found. Still engine stalls. A technician says that it could be the 3rd injector with a wire is faulty. I have Skoda Octavia 1.9 TDI ALH 2005

[@southwestinjectorremovals8932]

I'd recommend getting your injectors tested first to rule out any issues and then work from there

[@Balajis_Mart]

@@southwestinjectorremovals8932 Sure. Thank you so much

[@williamtindle2541]

How did you solve this? Did you fix yourself?

[@andyfutter1920]

Hi I have a 1.9cdti z19dt engine code but the only readings I am getting on my astroal true RMS 6000 set to auto oms is 000.4 is this rite the car still runs

[@studiosys]

Ive heard the VW caddy injectors are 600 quid each !, wtf is going on there ,, is the electrical system overloading the inj coil ?

[@southwestinjectorremovals8932]

I swopped 4 on a caddy last week and they were £300 per injector

[@JatinderSingh-jj5xi]

Nice video

[@frankyw8803]

Do you know anyone in the Cheltenham area please ?

[@daxachtung6533]

Hi. will this work on any injector? Will it work on diesel injectors?

[@samsonwoldu8593]

Thanks 👍

[@chrish-4142]

Can all your injectors go out at once?. I did what was shown here, and they all fall to zero.. what would cause your injectors to all go out at the same time?.. or is the testing procedure here wrong?.

[@southwestinjectorremovals8932]

The testing procedure is just a guide for piezo, if you're testing solenoid injectors then turn your meter up to its highest sensitivity

[@chrish-4142]

​@@southwestinjectorremovals8932ok I'll try that.. I'm trying to diagnose why injector is not energizing?. Or no pulse signal?. also what are the two wire terminals on my Bosch solenoid injector. Two fat red wires!. Constant 12v & pulse? Negative and positive?. Reason I ask is because there is continuity between the two terminals your showing

[@southwestinjectorremovals8932]

The video is for piezo injectors.solenoid injectors work at lower electrical pulses, lower resistance readings.

[@cesarjorgemurillobarientos1813]

very good master

[@sprinterfix]

silly question, do you know if all bosch diesel injectors on mercedes vans are piezo-electric? im specifically curious about the ones built in the last two decades

[@edwinvandeoudeweetering2162]

Sorry to say it, but the method used is completely wrong for solenoid-injectors. For example, a Denso solenoid injector has completely new a resistance of 1.1 Ohms. A Bosch solenoid injector not much more. If you set the Multimeter to the 200K Ohm range as done here, the meter will always show '0'. You then have to put the meter on the range up to 200 Ohms, at the very bottom. Only then will you be able to read the correct 1.1 Ohms from the multimeter. As done in the video, any solenoid injector will be falsely diagnosed as defective.

[@gloglo1275]

I set my multi meter to 200 like you suggested and I’m getting 1.4. Is that good?

[@edwinvandeoudeweetering2162]

@@gloglo1275 depending on what type of injector you are checking. It seems to be good 👍. Especially when they are all about the same value.

[@gloglo1275]

@@edwinvandeoudeweetering2162 Thanks for the response. I was getting a p2149,p2146, p2104. From what I’ve read it is possible to have one injector causing the rest of the codes, but have you seen one injector triggered two of the p2149,p2146? I sent the injector 4 to the company I got them from. Injectorsdirect. I got all 6 of them not even 2 weeks ago.

[@Lucentlens]

Thanks for this buddy! This video therefore ended up having the desired effect - causing a net increase in correct knowledge on the subject, by bringing out the likes of your kind self, within the comments section!

[@Ryu.FiOfficial]

Mine sir was read .5-.9 and the other was 1.2 . What was the correct reading of this injector...

[@studiosys]

Can you check the injectors while still in the engine block ?

[@southwestinjectorremovals8932]

You can do a resistance check or even a leak off test

[@piecetoyou8285]

Hi again Martin Ive taken out my injectrs that are a soleniod type I guess ` They are Siemens from ford fiesta TDCI 1.4 2008 they all read 205 ohms so i guess they are all good? But tried to do a pop off test on the bench, got to 3000 psi and nothing happend, As these are the electrical type that need voltage, will they only open when voltage is applied to them,or should they still open but more psi needs to be applied. I was thinking the 12v makes the soleniod work several times a second so fuel comes out off and on, But with no voltage and just pressure would still cause it to pop to allow fuel through, So back to the question do they need voltage to open?

[@Saintathantwinpeaks]

I've just watched a KZbin 'short' video where a man cleans his injectors by spraying canned brake cleaner through them whilst using crocodile clips attached to 11.1 V 30C lipo battery to open the injector. He also uses a tyre valve to remove the core from the injector, wraps black electrical tape around the brake cleaner can's nozzle to provide a tight fit onto the injector. Have a look for this video.

[@Budge.Bm.r75]

Hi, can you test them on the engine? Thank you, great videos.

[@southwestinjectorremovals8932]

Yes you can test them on the engine, you can do an electrical and a leak off taste in situ

[@ΕΛΛΑΣγιαΠΑΝΤΑ]

@@southwestinjectorremovals8932 Hello, how do I know how many ohms it should show?

[@Saintathantwinpeaks]

@@ΕΛΛΑΣγιαΠΑΝΤΑ Try pressing play.

[@ΕΛΛΑΣγιαΠΑΝΤΑ]

@@Saintathantwinpeaks 🖕

[@Onemanshow1974]

I have injector on newer 11 picasso green clips on return pipes. And one injector is slightly misfiring or rough when engine revs but fine on tickover ever heard of this?

[@MrLilygreen]

Yes , there could be a fault with the electrical side or ever a weak electrode and it is called " breaking down under load " simple it can't keep up with the demand of fuel supply when needed

[@stuungar3390]

Great, thanks

[@JamesJames-je3mp]

very thank your information and time

[@wilson61926]

Excelent master thanks a bunch

[@Yuuki1942]

180kohm right?

[@southwestinjectorremovals8932]

This is a general guide for piezo injectors.

[@Elvislives1977]

Around that yes but only for a couple of seconds

[@theomoshoette9344]

Can I also do the test for Volvo truck?

[@southwestinjectorremovals8932]

It all depends on what injector is on the truck. This is a general guide.

[@nigelbennett316]

What’s a peejo?

[@MUSONGEJENNIPHER-n1y]

What causes rough idling

[@southwestinjectorremovals8932]

It could be a multitude of things. If diagnostics show no fault codes , it could be a mechanical problem with the injectors. Blocked tip: no fuel delivery, or stuck tip: overfueling.

[@Alf-Garnish]

i did this test with injectors still in the car and they read open with a reading of 1. what would that tell me?

[@southwestinjectorremovals8932]

When you say open what do you mean. Are they solenoid or piezo injectors?

[@Alf-Garnish]

Hi, done again and got reading of 199 .Piezo injectors @@southwestinjectorremovals8932

[@gezimballa3493]

Can this type of fault be fixed when the resistance shows 0 kiloohms?

[@southwestinjectorremovals8932]

That depends on whether they are solenoid or piezo injectors

[@tomosdavies2353]

I’ve managed to check the 2 on the passenger side when they are in the van and they both went straight to 180 but I can’t get at the other 2 on the drivers side as there’s a black cover I can’t remove any tips would be much appreciated thanks

[@forced-induction]

If your dmm has crocodile clips you can get to the 2 left ones using a needle nose pliers, bit fiddly. Other option is remove the black part using 8mm socket, or another way is buy a plug off ebay 👍🏻

[@peterbanda5831]

Good video thanks

[@eagletran9]

Thank you sir

[@Elvislives1977]

What if it has around 188 but then drops to infinity, i have 3 reconditioned that all do this, i fitted them and car runs rough

[@southwestinjectorremovals8932]

I'm not 100% sure of your readings. This is a guideline for piezo injectors and not a definitive guide for all injectors.

[@paulevans4021]

Really good video..... any tips to watch out for on the 1.4tdci ford/citroen/peugot injectors?

[@hipstarchild]

I've tried his theory out on 4 fiesta tdci injectors and they all show some random numbers and then settle to zero !

[@paulevans4021]

@@hipstarchild doesn’t sound good, get then tested proper by someone before putting them back in. Did they work fine before, I only had mine out cos I was changing the seals

[@hipstarchild]

@@paulevans4021 I was given 4 of them. They are used so I just decided to keep them as spares for my car. After watching this video, I decided to test them with the multimeter. Now it seem like they are all broken..😕

[@paulevans4021]

@@hipstarchild check the battery on the multi meter or try testing on something else like a glow plug see what results you get

[@hipstarchild]

@@paulevans4021 I've just replaced the battery on the multimeter and still showing the same readings although I did check the solenoids on all 4 injectors with a 12v supply and I can hear them clicking nicely. But the injectors which were given to me were from a donor engine which had a tonne of black death carbon on them. Maybe the heat from the engine melted the inside of the electro magnet coils.

[@blingking82k]

Is this the same way for pd injectors

[@southwestinjectorremovals8932]

This is just a generalised video so there are always variations

[@blingking82k]

@@southwestinjectorremovals8932 thanks for the reply where is the best place to get injectors repaired in south wales

[@southwestinjectorremovals8932]

I use City Diesel in Swansea

[@Pamaco]

Does it work for Denso injectors? I have a Hyundai I20 and when I did this test, all 4 injectors were showing 0 resistance!

[@MrLilygreen]

Sorry this test might not work for all injectors,

[@xr4ixr4i1]

Are all the 2L injectors the same voltage and polarity. Thanks rob

[@southwestinjectorremovals8932]

No the solenoid injectors just show continuity if they are working ok.

[@cristian.A.L.C]

Muchas gracias

[@MrAndrjuha]

Hi, if x3 injectors shows 200.5 is it good or bad?

[@southwestinjectorremovals8932]

What year is the vehicle?is it a solenoid or piezo injector ?

[@MrAndrjuha]

​@@southwestinjectorremovals8932 Got more research and its Piezo injector, car is 2011

[@FS-ik1jg]

Hi. Great video! But did you mean they charge you for this test using only multimeter?

[@ssss-df5qz]

Injector refurbishers will do this test anyway but really what you need them for is to bench the injector in other areas, like the magnet, spray pattern and flow with (usually) the parameters to be coded to the ECM. It really is a specialist trade unfortunately. When you think about the beating diesel injectors get, the tolerances have to be ridiculously tight. They get hammered by compression from one side to high pressure fluid on the other. It's a wonder they work at all.

[@Saintathantwinpeaks]

Do you think they don't have to buy milk, put shoes on their kids' feet, pay their rent, put fuel in their cars and heat their workshops, etc? Regardless of whichever tool they use they still need to be paid for their time, or don't you agree?

[@mjaz2535]

hi mate same reading astra k 1.6 engine

[@timtec3000]

I test the piezo stack , one probe on injector body and pin on each terminal any reading and it's dead.

[@MrLilygreen]

If you get a reading when you test the body and one of the terminal then the injector is faulty

[@karlbigmore7949]

Citroen dispatch 2.0hdi continental injectors 147 to 167 on test that ok or not

[@southwestinjectorremovals8932]

It seems low but should be ok

[@karlbigmore7949]

@@southwestinjectorremovals8932 do you recon them and cost to do I'm in Cardiff will post 4 to you

[@southwestinjectorremovals8932]

No I don't recon. I send mine to City Diesel in Swansea

[@karlbigmore7949]

@@southwestinjectorremovals8932 ok thanks for your help and your vids

[@wepipe]

'resistance range you want'

[@forced-induction]

I've got the opposite it starts high then drops to 75 ohms. All 4 been replaced 3 years ago and only done 40k since 🤬

[@kevinhancock4064]

That's interesting were they original to? Not good mileage is it !

[@OngomJustine-xu7vj]

👍👍👍👍

[@Jonjs99]

Title Diesel injectors but what kind?

[@southwestinjectorremovals8932]

Mainly piezo injectors ie fuel feed pipe screws on top of injectors

[@Jonjs99]

@@southwestinjectorremovals8932 Thanks, but main question, is syringe leak back test any good on mechanical injectorsl like ones in v70 2.5 tdi or audi 1.9? Did this test it showed double ammount in first and second cylinder

[@southwestinjectorremovals8932]

Yes leak off tests are a good diagnostic tool for faulty injectors. Depending on how quickly the injectors fill the bottles ie if it takes less than 2 mins on tickover then they are faulty and need replacing.

[@sisayambaw8856]

thank you br

[@jacklamata2544]

I’m a little bit confused! Wire testing with ohm!? It not must be zero,,0”? If the wire is interrupted, it’s says LO not continuity! And when number appears, it’s low resistance! Wire has wick spot! I’m not a electrician! But I’m a vaper 😤😂 and numbers in ohm terms, mean’s tight… and 0 means strong continuity! But like I said, I’m confused!

[@joker8541]

👍👍👍

[@dannybartlett4225]

mine start at 169 170 and then goes down to zero on all 4

[@najmuln.8231]

Sopar

[@RP-hj2vc]

1.6 tdi cayx motor injectors as close as poss to 200k Ohm and capacity about 6000 uF, their common problem is internal short to ground at piezoelectric stack - poor design.