@@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
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.
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
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 ??
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!
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.
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.
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.
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)
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)
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.
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
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 ?
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?
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.
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
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.
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.
@@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.
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
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.
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
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?
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.
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.
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
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
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.
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?
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?
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
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.
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.
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.
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.
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.
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.
