This is the kind of information people will pay big money for, gotta love someone doing it on KZfaq to help everyone.

Amazing! You've raised the bar on KZfaq instructional videos. Thank you.

Incredibly well explained. Great information!

I've been an automotive, light duty diesel technician for 27 years, plus raised up in the car business. Been doing Diesel work for the last 12 years of my career. This video Is Awesome. Very Basic and a great video. I enjoy watching People that are intelligent of this kind of work.

Absolutely superb guide to the system. So clearly and patiently explained that, even as an amateur DIY mechanic, I was able to get to grips with the information and get my head around how to approach a diagnosis of my crank-no-start problem. Useful even just to help me discuss a diagnosis with my mechanic. Real impressive. You are a natural teacher, respect.

Excellent work Chris!! Absolutely love your knowledge and presentation. Keep up the great work.

Loved your discussion of the overall workings of the system. I have a common rail 5.9 Cummins and it is now 20 plus years old; therefore, diagnostics will being be more and more important. Thank you!

Thank you so much for posting this video in such a way that I could understand and use the information. The time it took to make and the completeness in pictures and explanation is priceless. Again thank you very much for your time and help.

What a great presentation. Clear and concise. You sir are a great teacher!

Excellent way to present the number of possibilities involved with the diesel fuel system. Enjoyed your sensibility and respect towards the art of the engine vs the vulgarian F bomb bad boy way. Classic!!!

Awesome easy to follow lesson, I understand fuel delivery of a common rail in 53 min amazing dude!!!

Great info. I have the t1n 2005 sprinter with low rail pressure . Thanks to your video i have a better understanding of the fuel rail system and have made a list to narrow down the problem

Great Video! I am inexperienced with Diesels, this video is actually organized and informative while not oversimplifying stuff. Keep up the great work man!

you are the professor bro. thank you so much for making this video. i'm a non-mechanic trying to resurrect a cummins/onan generator and this video gave me the jump start i needed

i've been looking for my perfect learning skills through any way to go but this guy's page gab my full attention (sience diagnotic is my best and easy point to learn fast as well too) thank you

I Dont really comment often, but just know you helped a Scania apprentice a lot. Thank You from Denmark !!

Great video. Lots of really good and useful information. Well explained. I haven’t bought my truck for towing an RV yet. Would like the diesel in the mountains. Not as as scared as I was. Thank you.

You’re Absolutely articulate . Would make a great teacher. System well explained.

Thanks for making this, relatively new to diesel and working as a tech in the field this was very informative for me.

That's a better explanation of the system than any of the courses I have ever been on 😎

Thanks clear concise and also gives a clear understanding of what you maybe undertaking!

Very informative, thank you for simplifying it .so much information out there .

the simplicity makes it easier for one to want to be a diesel mechanic.

Thank you very much the best information you share. Its a big thing for me as a beginner.

Wow! I feel a little less stupid knowing about diesel systems. I've watched this video twice and made plenty of notes. I reckon by the time I watch this video for the fifth time I should know something. I'm looking forward to another basic diesel education. Keep them coming. Great work Chris.

What a great video passing on knowledge is the greatest gift you can give

Thank you for your very clear explanation about fuel system. Really enjoyed & appreciate it! Very professional just like you're a professor in a classroom. I am from the Philippines. Mabuhay ka!

That was a rough draft ???? Wow! Excellent video, thank you!

Watched the video in full very good explanation of the total system. I can tell you are not reading from a book and got experience. Thanks, J S.

Great video mate from Australia thanks for the lesson.

Great information on the Diesel Common Rail System. Very informative and well presented. Well Done Sir! Mahalo 🤙

Thank you. Excellent and well presented information. Best wishes from UK

Excellent explanation of the system!

Thanks professor,you are great teacher

Wow just got to say really great video. you covered so much here and in such a good systematic way and easy to under stand. Only two things i could add here, for a non starting diesel engine are 1 cranking speed which you covered by saying battery but also starter motors can be the problem. but some diesel engines need a minimum crank speed to start. and 2 is EGR valves, if these are stuck in open position they can stop engine starting as the air/fuel mixture is compromised/disrupted. Thanks again for the great video

Very interesting! Great video in depth!

Some people act like they know what they're talking about there is no doubt that you do and that you are the man I'm so glad I found you saving me from a nightmare of bad Direction I will be subscribing

It is indeed a fantastic lectures. My coming across your lecture coinsided with having fault of starting failure with my 2010 hyumdai tucson diesel. Your lecture enable me to successfully did a lot of test. Where I am now to know whether or not my rail pressure sensor/pressure regulator are good.

Your one clever man, thank you for your advice.

Excellent lecture, well explained.

Very clear and very good explained, you are my best teacher ever! Greetings from Holland i and wish you hugh succes!

I know you'll wonder how I finished the whole video in 42 minutes ... and the answer is 1.5x speed 😁. Great video man. I even learned a few things

Great clear well presented information. Thank you

Perfect video. Thanks . The relief valve is also named as " pressure limiting valve" in some cases.

Awesome Video Mate, very well explained. Keep it up. Cheers

Thank you, this was one of the best ive Seen and very well Potrayed, I'm new at this your information Was very easy to follow.

Science of Diagnostic KNOWLEDGEABLE Great tutorial brilliant video thank you very much helpful video Science of Diagnostic. Pauly 's Auto was right about this channel thank you Pauly 's Auto From Nick Ayivor from London England UK 🇬🇧

Appreciate your explanation on common rail. Well Done Sir! Mahalo 🤙

We are learning✍️... thank you sir.

Great vid. Thanks a heap. My diesel 4x4 is Crank no start, now I have methodology for figuring out what’s up. I suspected fuel but nice to know how and where to look / trace the flows.

Absolutely good explanation I learn a lot thanks

Man you earned a subscription i love this

Excellent presentation. Out of all the wealth of information you just shared -for me- the key to the diagnostic kingdom you mentioned is- "If your low pressure side isn't delivering sufficient pressure, the high pressure side can not make it's required pressure" (paraphrased). Jumping right into injector failure mode rather than considering first that the issue may be something as simple as an undetectable air leak, will destroy your credibility and break your business/wallet.. I replaced my OEM (piss poor and leak prone system) with a positive pressure (lift) in tank component and a primer blank out unit after 3 weeks of spanking around with every connection and potential air leak -with only 1 one possible leak point found. When you do the math-it's much cheaper to just junk the stock fuel delivery system, and upgrade to a quality USA made lift system. Final diagnostic note... This vehicle was found to have lost the CP3 lift pump capability putting it in a "no start condition". Problem was overridden via the lift pump installation. Thank you Sir.

That was layman's terms BRILLIANT!!!

Muito bom , parabéns! Very good , thanks!

Great video and explained very well indeed, thankyou

great info thanks for providing the data

Excellent video, well done

Great vid. Thanks man

Awesome... Thanks for sharing. Cheers.

Best explanation ever wis I’d seen this video before I had trouble with a diesel ford mondeo UK crank but no start I ended up putting it into a garage who systematically ripped me off never got it running and I’ve been working on cars for years 😂but mention diesel’s over here and you can see £ signs in their eyes but really when you look at a diesel if it’s not running 9 out of 10 it’s the fuel thanks for the info

Im not a car guy bit i really enjoyed this video. Cheers.

This is the most informative in-depth video on diesel diag I have ever seen think you so much please keep doing what your doing. Do you have any in depth DEF, DPF, SCR diag videos?

From my experience, trucks that have primary fuel filter and a secondary fuel filter or fuel water separator never seem to have fuel related issues. As long as you change them after every pm service you’re good. It’s the trucks that only have one filter or separator that have a lot fuel system problems

Thanks, great info 👍

Dammm!~ some people are a pleasure to learn from... somewhat rare! You are one rare gem! I have a 2010 Chevrolet 4500 mini bus/shuttle with a 2011 running train factory installed (the LGH) and it says on the sticker it is a DI(Direct Injection)... I may not have a rail type... I have no idea! I have to snoop and get more info, clues! I am but a noob! UPDATE: after snooping I now know that common rail is direct injection since quite a while back..

Great video. light vehicle Diesel Diag is a big thing in Oz at the moment

Well done for this, regards

Bloody good piece of content. Come on, get the next video going bro I'm going to subscribe and wait for it!

Sincerely, Impressive presentation sir.1979 John Deere 2840 -the Gifted-WorkHorse I am now (only now, after 20+ years of use/abuse) am forced to look directly in the mouth. Suffice to say, you saved my ass - it's cold in Michigan February. It's colder without my tractor. Thanks man. Sincerely.

Best what I newer seen !!❤🎉❤!! It's true wreally !🎉!

Awsome bro thanks plenty got it totally

Muchas gracias.

Very interesting, like to learn more

Great job on the video

Very good , thanks!

This video is great! I'm trying to diagnose a no start after water in my filter and my engine shut down.

Thanks for sharing

Thanks very good info.

Very well done 👍👍👍

Well done thank you.

Very good info

really good. Thanks

thank u bro ,thank s for teaching

This was great

Valuable video here folks

Nc Solid explanations, Lods

Brilliant

Thank you

Awesome Video and illustrates very well how important the fuel pressure is. Hence I want to monitor the fuel pressure of my CRD. Where would I hook the Fuel pressure gauge (e.g. from Defi, AEM aso)? Furthermore which bar range should the gauge support? Which gauge do you recommend?

Awesome video! I'm working on a JD350G and I'm experiencing issues with the fuel system. The engine sound like its running off 5 cylinders. I checked the fuel supply at #1 port at the rail and no fuel was coming out. I pulled the fitting with the spool and spring and cleaned it/checked the movement. The spool and spring seemed to be fine. At this point, I'm thinking the rail or the injection pump pressure regulator might be causing the issue. Have you experienced anything similar to this problem?

That's exactly why I'm here lol. I'm used to older petrol engines.

Well done sir

Just subscribed to your channel.keep them coming.same as you.i work on heavy equipment cat and komatsu.

Sir you’re a great teacher ! How about teaching us onhows the flow of diesel fuel in isuzu trooper w / 4jx1 engine works . So many trooper owner may get happy if you can do that , because we’re getting too much hard in trouble shooting w/ this engine every we opem up the diesel line . Like replacing fuel filter after that we’re getting to re - start it up , so please help us ! I’m from the Philippines thanks a lot & God Bless You !

I'm a new Diesel truck owner, thank you very much for simplifying how the system works. I'm having issues with my truck only starting after being plugged in, if I don't plug it up over night, it will not start !!! By chance can you tell me what may be the problem ?

Thank you for the education.Please I have an issue with my 2013 Jeep Grand Cherokee CRD.I need your help

cool , man thanks

Great video Chris. As always I appreciate your thorough attention to detail. I didn't know you were CAT certified. Were you more on the truck side of things or did you do off-highway? Looking forward to the next part! -Z-

A Very nice video Christ .Which system has range rover vogue 2002 3 liter diesel ?