What is Common Rail Fuel Injection? 🔧

[@rawlepaul5976]

Can kerocine be used in the system

[@thoroughbreddiesel]

No. Only run #2 on road diesel.

[@DakotaRTken]

@Paul Klein So, in short... No.

[@Justthemow]

If you put sea foam or marvel mystery oil or hot shot secrets in your truck it is kerosene

[@willdiesel3909]

@paulklein8556 Así es. Es mas yo de vez en cuando agrego un cuarto de aceite 40 monogrado junto con el combustible.

[@MrGodsking]

@@thoroughbreddiesel im in ireland,we have no help over here,I have fiat ducato 2.8 jtd common rail no fuel at the rail,New pump fuel lines and filter fitted,have you any ideas you could throw at it

[@ajingolk7716]

The common rail is like an air compressor but inplace air fuel is compressed once it rich a specific pressure it cutoff then this compressed fuel is feed to the injectors which are controlled with a ECU.

[@kennethtomaszewski3795]

From heui to common rail, amazing how making things more simple works

[@henryattfield8979]

My grandad invented this at Perkins, he was the head engineer, got an OBE for it

[@c295014]

Wade, Thanks for the great wealth of information you put forth in the Diesel University videos. Lots of info for the length of each video, Good work, Thanks

[@thoroughbreddiesel]

Thank you and we are glad you enjoy them. There are plenty more to come so make sure stay tuned!

[@isaacasare7242]

Good work,thank u very much I have now understood how a common rail system works.

[@kondwanijaykangwale6070]

What are other types of fuel system?

[@JerichoRally]

Your demo rail, the one for the 5.9... it only has 1 injector connected. Where do the other injectors connect? I see the 5 other ports on the rail but I guess I just expected all the injector ports to be in a row. (I'm making the assumption that the 5.9 is a 6cyl)

[@thoroughbreddiesel]

We show a 8 cyl and 6 cyl rail here. On a 6 cylinder in line, all fuel lines will be on top of the rail.

[@richardwelkiv8325]

So first let me say thank you for the video , Second I want to apologize right up front for my terminology or lack there of . Here goes . It seems to me that the injection pump is now just a high pressure pump which supplies fuel to the injectors all the same consistently . What I think happens next is the injectors are electronically operated when to open from some sort of command module . Compared to my p7100 pump which each injector has an individual line from the pump to the injector and then probably has some type of distributor mechanism these modern pumps only have to supply fuel to common rail and from there the injectors get there instructions from a computer ( I think ) . Though this greatly simplifies the responsibilities of the pump the weak link here to me is the computer for if it does not send out the right signal at the right time I don't think it could be good . Am I close here ??

[@esb1681]

Hello I have a 2006 dodge 2500 5.9 and I been having this problem so start the truck starts normal when I start driving I feel like it stops accelerating 2 or 3 seconds and it resumes accelerating it does this a few times once I get to 40 or 50 mph drives normal but if I spot at are’s light or I get traffic in the highway it does the same thing replace fuel filter then replace fuel pump and it still doing it I gladly appreciate any help thanks.

[@stevewaclo167]

Hey Wade, an excellent overview of common rail injection systems but I disagree the "injector is the brain". As I believe you will agree (on second thought 😀?), an injector only does what it's told, in the case of my LB7, by the Fuel Injection Control Module, itself with instructions from the Engine Control Unit. Looking forward to future installments!

[@thoroughbreddiesel]

You are 100% correct. I did not put enough emphasis on FICM and ECM in this video. Injectors are by all means a “slave” unit in the system as well.

[@babarqaisar5391]

What is the fuel injector pressure

[@jellybeanjellybean-tn2lm]

We have a manlift that shutdown abruptly while in use. After that, it did not starting anymore, just cranking(with enough diesel). Its engine is Deutz TCD 2.9 L4. What could be the problem? Could you also point the locations of certain parts(names) of the engine? Hoping to help me out on this problem. Thank you and more power.

[@catworld1515]

if pressure relief valve fails it may cause a hot start missfire? I got a honda diesel and is driving me crazy for 6 month already. Morning with cold engine starts fine but after a 30 minutes drive starts after 2 or 3 attempts.

[@thoroughbreddiesel]

I'm not familiar with that motor, but sounds like a supply problem, low side fuel pressure.

[@mawutoragblekpe8736]

Good for me

[@fathieljali2058]

Im just vistor but your explain vrey helpful

[@thoroughbreddiesel]

Thanks!

[@nickpierpoint4116]

Good explanation my friend, Watching you from Oxford, England!

[@thoroughbreddiesel]

Thanks!

[@helpingstarjeengaph2846]

Nick Pierpoint good

[@MrGodsking]

are you handy with common rail

[@stavio12]

I've got a Nissan Patrol Common Rail turbo diesel. Just found out after last service that the fuel injection pump is leaking. Is that the dumb pump (CP3 Pump) that you are talking about in the video. The cost to replace that part is around $4000, that is expensive. Why is that so expensive?

[@thoroughbreddiesel]

I would have to see the quote on the repair, I am not familiar with the Nissan so I don’t know if it’s the CP3 that is so expensive or the labor to change it.

[@stavio12]

@@thoroughbreddiesel labour is $880 AUD, rest is the part. Have to save up for it as I cannot afford that at the moment.

[@serutukanatukana2920]

I've going through a problem, where the fuel rail return line is giving extra heat on the hose and pipe

[@thoroughbreddiesel]

That’s a sign that you have a high fuel return condition.

[@teluguvideomemetemplates1528]

is the pressure limiting valve and control valve the same?

[@thoroughbreddiesel]

Depends on who you are talking to. Pressure limiting is the same as the cascade or overflow valve on the rail. Control valve is usually the electronically controlled portion of the common rail pump that controls the pressure delivered to the rail and injectors.

[@teluguvideomemetemplates1528]

@@thoroughbreddiesel ok bro tq

[@teluguvideomemetemplates1528]

can it also be called as metering valve, the pressure control valve

[@user-UnkleAyasi]

How is the engine get more power after applying accelerator, accelerator provide fuel or air on common rail engine?

[@thoroughbreddiesel]

Complicated question on common rail engines. It is commanding a fueling combination that if it is agreeable with other engine conditions will produce more RPM’s.

[@JohnCamp]

Can you do a video going over the best diesel injection systems in a list for running heated vegetable oil?

[@Justthemow]

P7100 12 valve Cummins

[@richardrichard5409]

Don't use it, no fuel injection system is designed to operate correctly and reliably with anything but diesel fuel.

[@shautodiag6069]

Hii how many bars are needed why ECU controls the common rail injectors?

[@thoroughbreddiesel]

Example of a Lb7 Duramax (2001-2004 Model Years) works in a 5000 to 24000 psi (roughly) range so 344 Bar to 1650 Bar.

[@MINE-nq2un]

Sir what is the common problem of common rail pressure pump, diesel fuel goes to engine oil crankcase

[@thoroughbreddiesel]

Drive shaft seal but that is a very uncommon failure. If you are having diesel in oil suspect injector failure of some sort.

[@teammaheshbabu8712]

sir is the pressure control valve and pressure relief valve the same ?

[@thoroughbreddiesel]

Yes and no, it depends on who is talking and what they are referring to. A pressure relief valve is often call a cascade valve or some people mistakenly refer to them as “race valves”. They can be fully mechanical or electronically actuated in some applications. Usually found in the fuel rail. A FCA or fuel control actuator (sometimes called a MPROP) is usually located in the injection pump and it controls the fuel pressure supplied by the fuel rail.

[@teluguvideomemetemplates1528]

@@thoroughbreddiesel means the metering valve and pcv on pump is same sir?

[@kentwo3134]

I have a mitsubishi common rail crank no start but when i spray some starting fluid in the intake it will start.have any advice?thanknu

[@jamesbarratt593]

One question no one seems to know the answer to. And a firm in Brighton called auto diesel marine a Bosch agent repairing injectors and repairing engines had no idea. How terrible they did not know the exact point in a Diesel engine when the injector fires. I’m after thinking about it, believe that it is either just after piston has reached top dead centre so as the explosion goes off it fires downwards. Or as piston rising from air intake stroke. As it’s pressurised in the rail, and if it was to be injected into the compressing air, I would think maybe when piston is 75 percent up and air not too hot yet to make Diesel go bang. My first answer I believe more though. Do you know?

[@richardrichard5409]

Always injects before top centre dead centre, which varirs with load and speed but, modern systems may inject up to 8 times per duty cycle, one reason modern injectors are so unreliable.

[@jaibabu7481]

whats the function or need of overflow hose in the system and iS it connected to injectors?

[@thoroughbreddiesel]

It can be connected to the injector returns. The overflow hose from what is the cascade valve is for fuel that is tripped from the relief valve.

[@jaibabu7481]

@@thoroughbreddiesel thank you ❣️

[@thoroughbreddiesel]

@@jaibabu7481 you're welcome!

[@jaibabu7481]

in isuzu dmax 4ja1 engine one pipe from fuel pump is connected to the engine block and a connector connected to it what is that for bro

[@jaibabu7481]

i think the pump has integrated pcv

[@gopalakrishnadoddi4869]

good afternoon sir i have a small doubt how much voltage is given to crdi fuel injector p;ease inform me thank you sir

[@SomethingFromTheShed]

Is the cp3 a liquid sealed pump or a rubber seal pump ? Also what is the volts deliverd to the fuel injecters ? If the fuel line is airlocked could i expose the top of the inlet manifold and block it. Then turn the engine over to use its nayiral suction to pull the fuel through the line from the tank to the injecters ?

[@mayofrancisco1939]

thank you for sharing video very informative. i would like to ask what is the problem of my Toyota 2kd d4d. its loosing fuel pressure when i start my engine. im pumping my fuel filter everytime i start. and it does not run long time it stalls . thanks for the answer

[@tinasheishmmaelmunemo9977]

You have same problem with me

[@pauldeckson]

What problem if fuel not comfortable of the pressure

[@thoroughbreddiesel]

I don’t understand the question but the pressure of the lift pump is the life line of fuel delivery to the high side injection system (on fuel systems designed to work with a lift pump)

[@jacksonmusyoka1216]

What can causes ecu to deliver low to voltage to the sdv

[@thoroughbreddiesel]

Are talking about a shut down valve? And by that are you referring to a MPROP or FCA? If so, then would look at commanded actuation vs. actual, and see if it is losing signal in the wire or is there something in the 5V reference circuit that is the problem.

[@jacksonmusyoka1216]

@@thoroughbreddiesel Am talking about suction control valve in a toyota 2kd injector pump which is giving me less than 3 volts in the connector with key on.

[@ibmk6308]

please ,can you advise me regarding the possible causes of loosing pressure of fuel from common rail & injectors after 30 minutes approx,our engine is perkins derive gen-set 250 kva, thats led to shutdown of diesel engine ,in spite of every thing is ok,,normal starting and loading to our actual load 45% of generator rating... thanks in advance

[@FranciscoQ777]

Thanks

[@lungelomkhasibe6087]

hello how do you bleed air out of this sytem

[@aarenmyatt4509]

Yeah right so basic pump and ridiculously expensive injectors 💉. A win for the environment, manufacturers and parts dealers. 👌

[@rockerneck]

I have a feeling even diesel guys don't know how diesel engines work.

[@thoroughbreddiesel]

That is one reason why we made this channel! Education is the key to success.

[@lohhjjlohicv6829]

I m from Serbia there are not a lot of gasoline engines here its simple if it sorounds you its like learning a language its easier to learn english in England than in china

[@ramilpepito984]

Sir good day i hev a problem of an engene 6m60 the common rail injection is that normal wen the engene is at normal idle i loosen the injection in 1 piston ther is no fuel are coming out only the injector 3 has a fuel coming out cen you help me pls im prom phillippenes

[@adarshyadav1411]

Nice

[@thoroughbreddiesel]

Thanks!

[@thirngaamarasinghe8168]

What is the reason without pressure sensor

[@kumrhim1348]

Thanks so much Master, I which to be your student

[@marcusmarcus3271]

how can I remove air in the diesel to started

[@PRMcCausland]

Excellent information. Hand motions are fine. I'm studying CR for heavy truck applications. You helped a great deal. Thanks, but please, loose the background music. Us Canucks can't hear your awesome accent.

[@randylee2549]

Wade good morning from rainy west coast Canada. I like your diesel tech...helped me a lot in the past. well, I've got a 2007 classic LBZ Duramax, under 2/2 or more heavy instant throttle I get a steady haze of black smoke, lighter than dark, but it's not a normal LBZ haze, it's thicker. no limps, from low rail pressure or anything , but why would a 130000 mile good running truck do this ? runs great! thanks Wade, looking forward to your weigh in! Randall

[@thoroughbreddiesel]

That is an odd one from your description. It’s almost like you are getting an incorrect vane position compared to your throttle position. I would have to see a log of the truck running to be able to help.

[@randylee2549]

I see, I think you have it pegged right, something to do with the turbo side. How Dan I get it data logged without EFI Live? A GM scan tool (Tech 2)? A dealership nearby is very helpful with scanning assistance and reasonable on labor to do so. What logs specifically can be recorded?

[@randylee2549]

Btw Wade NO TURBO VANE POSITION SENSOR fault code ever....

[@thoroughbreddiesel]

Desired and actual vane position would be two parameters that I would look at. They can run real-time scans with the Tech 2.

[@randylee2549]

That makes sense with the turbo being a mechanical device, and it's operation being sensed by electronics can be monitored. I drove it 200 miles yesterday on a good highway run. Even on 70% throttle, hard acceleration from a stop I'm getting less and less black smoke and more of a regular LBZ haze. I think it was just sooted up by the in town driving of the last owner's hugely in town use. One thing I found interesting on this drive is at exactly 9000 miles, the change engine oil level from the DIC came up, does this really mean that the DIC is not set for 10000 miles as a mileage ticker, and uses real world use engine parameters to decide?

[@Mitchbandito]

I have a question about my 2005 5.9 common rail My truck started fine in the morning’s and runs fine throughout the day has power everything but if I shut it off when it’s warmed up going to the store five minutes later go to start it back up it doesn’t wanna as it would when’s it’s cold but will start but has a long cranking time before it does fire usually like seven seconds to 10 seconds of cranking, Ive replace actuator on cp3 clean relive ball on cp3 and now difference new lift pump 1 year ago has 230000!miles replace fuel filter every 4000 miles please help

[@azizagasi7887]

It would be really helpful if you can provide a simplified diagram of the same, the ones that I have are way too complicated to understand

[@ludwigdubois4832]

hello for start engine i need to take off midle valve, and put back and engine can start, i don't waht happen, i need help thanks

[@sandveldoff-campdrifters2174]

4B90 Rail pressure monitoring on engine start, bmw e60 530d. Please advice!

[@dervalscott9819]

How to charge up the injector rail

[@jeffreyselma2979]

Sir my 6wf1 common real crank but not start what problem?

[@evanxyelisante3028]

1kd hilax of 2012 not cracks te ingine which is the problems

[@yasinguran9308]

How much is a john deere 6115d common rail ?

[@wahedtany8527]

how i check the signal from ECU that is the point especially in common rail every injector has two separat wires coming from ECU i will be thankful if i receive your answer thanx

[@thoroughbreddiesel]

The signal to the injectors is so fast that only VERY high end multimeters will read it. A low amp probe may be the ticket.

[@chrissuarez7484]

how to put injection pump of 6m70 commonrail

[@thewholeworldinsideyourhou3392]

What about bleeding in case of fuel ran out does it needs bleeding?

[@thoroughbreddiesel]

Common rail injection systems do not need to be bled. Make sure all lines are tight and if you have sufficient lift pump pressure, crank the truck in 5 second intervals till it starts.

[@shalloylove6101]

Can bad fuel pump burn injectors?

[@thoroughbreddiesel]

Low rail pressure can cause damage to your injectors, as it relates to heat and air cavitation damage.

[@brentstam2351]

Can anybody tell me why My Isuzu diesel NPR shuts down for no reason, code says rail fuel dump I shut it off. start it back up and away we go.

[@abdulgoni9249]

Sir, i want to talk to, is it possible?

[@rachelrampersad8841]

How to bleed air out of this system

[@jenseirikskogstad5901]

Nothing to bleed out system, start up the engine until all air is removed out of the common rail injection then the engine is starting to run. The dieselfilter must be bleeded out after the filter is replaced. Greetings from car mechanic in Norway.

[@jaymarkmoreno8434]

common trouble in engine 6m70 engine

[@nmkhan6246]

Injection current can't coming..

[@abhish155]

What is common rail engine?

[@fitofight8540]

Engines today are too dependent on computers.

[@mrbullet5874]

The pressure pump can repair?

[@raghavendrakalaghatagi7971]

what is the hell not shown practical.. injection working and .. fip. working.

[@geoffbanks6197]

And the injectors ?????????

[@mrmyorky5634]

To much arm waving and irrelevant waffle for me. A straightforward line drawing would have been more helpful.

[@sandveldoff-campdrifters2174]

Hi thanks for the video, my bmw 530d e60 has fuel coming from fuel pump in tank and stops by high pressure diesel pump! The high pressure diesel pump doesn't send it to the common rail. Any idea? Car cranks but won't start. Scan it and get CODE: 4B90 RAIL MONITORING ON ENGINE START.

[@geneviepardillo8823]

I want to be a mechanic...i want to oooo. I work in many shop... But i want to be your helper... Marlon m pardillo

[@johnstuart3851]

You have that injector and line connected to the rail at the pressure relief valve on the end of the rail. The connected injector cannot get any fuel from that port, so whoever setup that example does not know how the system works.

[@qualquerdomundo]

Common rail não vale nada. Você ficará dias procurando o defeito por eliminação e não ganhará nada com isso. Arrume trabalho melhor. Common rail is worthless. You will spend days looking for the deletion defect and will not gain anything from it. Arrange work better.

[@jenseirikskogstad5901]

Use diagnosis tools connected to ECU and measure amount of fuel from each injector and measure pressure in the fuel system. To find fault will take up to 30 minutes and some hours to replace defect parts. Greetings from car mechanic in Norway.

[@tedotube]

how I test common rail injecter using multimeter?