DAF LOW PRESSURE fuel faults and how to fix them-jaltest 

Thanks for the comment Darren 😀. I tried the best I could to make it interesting, I could have just pulled the filter but where is the fun in that 😅

Thank you very much for the comment! 😎 I'm just trying to help people do diagnostics the right way 👌 I hope the videos help you in some way 😉

Hey norb 👋 I did enjoy the holiday buddy! 30*c EVERYDAY is better than this snow ❄️. This is where people go wrong, it's all evidence-based diagnostics in my eyes. YOU HAVE TO FIND A ISSUE! You can't be a parts changer or just try and wing it 🫣 That issue you had sounds very similar to issues I've had with the transportation valve at the back of the engine! another brilliant design 😅.

Thank you for watching the video Luis 👌. I'm glad you think they are informative 😎. I'm working on the app, but I'm trying to keep up with my online shop, which slows things down, but when it's ready, I will be sure to let you know friend 😉

Thanks for the comment, I'm glad you get something from the videos 😎

BILL how are you! Nice to see you comment again 👍 🙂. I changed that strainer filter but didn't change the main filter, chances are it had never been cleaned on service. I should of done the main fuel filter too 🙈🙊. I'd love to come to Greece again and work on some dafs 😂 Catch you soon 😎

Hey, thanks for the comment. Don't know how it ended up over here lol I'd be a bit worried about dirt in the fuel filter!!! Sounds like a right nightmare job!

oooo yes bro but I get it all cleaned up and the truck is running well now. No problem

Hey dirk👋, I'm glad you thought the video was good! I sat on this video for about a week wondering if I should release it 🤔, I wasn't happy with the focus of the camera using this stupid tablet! I'm just after some feedback........what did you like about it?

Thanks and welcome 😎

Ha ha ha, thanks for the comment buddy! When I had the rep come out in the other depo I work in I specifically said I want it on a Toughbook and it's bloody amazing on that! BUT in this depo, I'm currently working at its on some over-clocked cheap of cheap tablet with a smashed screen 🤯🫣.

Cheers Steve 👋. Glad you liked it and thanks for watching 👀 👍

Thanks for the comment and thank you for watching 👀 . Hope it helps you in the future 😎

Thank you for the comment and for watching the video. I hope it helps you in some way 😎

Hey Lee 👋 hope you are well buddy! I'm glad you enjoyed the video. Don't get me wrong DAVIE is undeniably THE BEST TOOL for DAF as at the end of the day it's a dealer tool BUT IF a diagnostic tool you can communicate with the truck, read the fault codes and have some tests you have 98% Davie functionality! (The other two percent is programming and fault code explanation) 😅😅😅😅

@@TRUCKTECHUK Yes, the programming is it’s only downfall, but for fault code explanation, especially for Daf, we call the tech support and they send the explanation/ testing data needed from RMI info (Of course, your vids are brilliant 🤩 and thanks for them, I don’t think I have watched one that I haven’t experienced the same, or similar issues)👍

@LEE KEBBELL yes we did have the tech support but people didn't use it. 🙄 I'm sure it's about 300 quid a year which isn't bad really if you're stuck and don't know which way to turn. The ecu program can be got around with K-TAG, it's something I'm looking at offering in the future for stuff. And thanks for the continued support...you know how to get hold of me if your stuck for anything daf related 😆

@@TRUCKTECHUK Thanks Buddy 👍👍👍

Hi could you do a video of the AEBS malfunction/ Adaptive cruise control system malfunction. Ideally using a jaltest! Kind regards

You're welcome! Thank you for watching it 🙏

Thanks for the comment 👌😎. I've still not got around to finishing it but I will try to this year when I take on some staff 😅

Hey 👋 thanks for watching the video and for the comment 😀

Hi, thanks for the comment. I'm in the process of setting up training which will be online and in-person, I might be a year away from this all going online yet but watch this space 👀

Hi, thanks for the comment. The issue is a manufacturing defect, which is why daf are replacing them reactively and then proactively. The affected vehicle owners would have been contacted and told to bring vehicles in for rework under warranty. In regards to prevention, the only thing you can do to increase the longevity of the engine is make sure your valve clearances are done when recommended and ensure you stick to the service intervals for oil changes 😉

@@TRUCKTECHUK Thank you for answering my question. What type of engine oil do you suggest for my DAF XF 2019? I have heard that some mechanics in our country replace the Euro 6 mx-13 engine oil pump with a Euro 5 gear oil pump for DAF trucks. Is this a safe and acceptable practice, or should I avoid it? Lastly, I am also curious about the ideal oil pressure for my DAF XF 480 Euro 6 engine. Could you please advise me on what the recommended oil pressure range should be at idle and full load?

Cam lobes are pressed on , after some time or sudden resistance they lose there tolerances and decide to spin freely🤦🏽‍♂️ hence why this problem never happened in the MX13 €5 😎

Hey, thanks for the comment and for taking the time to watch the video. It means a lot 😎

Hi thanks for the comment. 👌 I might get around to finishing it sometime soon now I've more time to do it 🤣🙈

Thanks, STU 😊

Hey Beny, thanks for the comment and for watching. JALtest do offer help and explanations but you have to have an active software license and subscribe to the help desk. Both we don't have at the moment 😕

@@TRUCKTECHUK I get it bro. Have a nice day!

No problem buddy 👍. Catch you soon 😎

Hey Kyle 👋, yes I've a affiliate link here for you. It doesn’t cost you any extra, and I only recommend products and services I trust. links to breakout leads: ebay.us/Wlcr2U I usually add affiliate links in the descriptions of things I use such as my mini digital osilloscope or WiFi bore scope camera. I'm contemplating stocking all the items when I release my NOX sensor diagnostic tool as alot of people want this stuff and non of it is from the UK so wait times are long and I'd be able to post them personally then

​@@TRUCKTECHUKp

And links for pressure testers or are these daf only? Appreciate tge reply mate and loving the content

@Kyle Lovett they are daf only but I've identified the fittings and I'm just trying to get some reasonably priced gauges sorted which is cheaper than dafs price of 500 quid 😅

Hey josh. 👋 it's the 3rd project on my list currently. Once I've got this book and these nox sensor testing tools done and released the app will be my priority buddy

@@TRUCKTECHUK okay no worries will be keeping an eye out on your page 🤙

If anything is coming out buddy I will do posts and a video on it. ...you won't miss it. The reason things take forever is I just don't want people using stuff they wouldn't be 100% happy with 😎

Hey, thanks for your comment 😊. If your low-pressure fuel system is good I would say your high pressure is possibly correcting to high speed I'd be looking at injectors or fuel pump elements. Hope this helps 🤔👌

Thank you for the answer. I recently began to engage in DAF, I have a question if you can answer, I will be grateful. So the high pressure fuel pump shows 10.2% at a coolant temperature of 75 and the amount of fuel at the injectors 16mg / h, low pressure 7.6bar is it precisely by these parameters that something is wrong? Confuses 16mg / h and I don’t understand the pressure created by the pumps why there are 2 of them, and the parameter is 1.

@user-ew2bl8ts6i I hope you're sitting down for this one. So.......... 2 high-pressure pumps means if one fails the truck will keep running, but also two pumps allow the fuel pumps to run at half the capacity. The correctional value is VERY important. The PCI ECU knows how much fuel needs to be used per injection. If this is factory correct you would see a correctional value of 0 or somewhere near such as minus from my experience. What happens if you start having Injector or pressure control valve issues is the fuel pumps start to OVER correct and your correction value increases........the worse the leak off the higher the correctional value till one day you have fault codes p0094 and p228d. This is a VERY basic overview of how these fault codes occur and you can have other contributing factors such as camshaft failure and one-way valve issues in the fuel pumping elements.

Thank you for your broad and informative response

Please help

Start at the beginning and work your way through the fuel and air system. Check for restrictions in fuel pressure such as filter, the same which the inlet on the air system....when was the air filter changed last? Have you checked all the induction system and intercooler? When was the valve clearances set last? Fault codes usually indicate a big issue as one system expects another to respond with certain data, and if this isn't correct, you will get a fault code such as a split boost pipe. I would pressure test or smoke test the engine for air leaks, then look at more complex things such as vtg, soot load ect Hope this helps 🙏

Hey John it's a set from dafs special tools section ......I'm sure it costs as much as a new truck from daf 😂😂😂😂. If you're serious I could look at getting them made up as a kit as I've been asked for the leak-off test kit doing injectors too

Ok thanks for your reply

Thank you for the comment. 👌 I think if you're given a path to success, such as how to overcome obstacles, information on what to test, and you come to it with a wanting to understand it all I'd say you could do it in a year. The issue everyone has is how intense the training would be. I'm building a mastermind group for like-minded people who want to advance to mastertech level but need support. it will have technicians at different levels of success and with different strengths and weaknesses. This way, each member can lend their strengths to other members of the group and work on their weaknesses, allowing them to advance rapidly and not be stuck like I was for years in technican purgatory

@@TRUCKTECHUK okay sir,I would like to join such group,cause I really need a source of good technical knowledge from a reliable source....I am an apprentice in Africa,so we don't have those tools you normally use on your video,I wish we had them... diagnosis would be easier,and there will be less trial and error acts....I wish I lived in your country...your apprentice are lucky,they don't even know.... Please inform me when you have created the mastermind group

Hey buddy, I've a table that explains when this happens in my members' area, BUT every time the truck sees an AdBlue level change after ignition off, the ecu does an AdBlue quality check. The quality check is performed by comparing NOx before and after catalyst. This is then used to evaluate the conversion of NOx. Topping up the adblue starts this process.

I've checked with the importer, and Jaltest doesn't do cars. It pretty much does anything else though

Hey, sorry for the late reply. The fault code you describe is related to the adblue lines being restricted. I suggest you get all the lines cleaned out and ensure the pump module is able to prime to the adblue dosing valve 👌

@@TRUCKTECHUK hi, thanks for your reply. I did all that on Saturday and I unscrewed the entire unit and cleaned everything including the hoses and the nozzle and deleted the error, (I clean the nozzle often) but today the error appeared again. It said about an ecu communication error and I found corrosion on the connector, so I cleaned everything, so I don't know where to continue.

@Martin Ovesný have you run a dosing test on it to see if it produces 100ml of adblue?

@@TRUCKTECHUK I haven't tried that, but I will definitely try it, but if the error is saved or lights up on the dashboard, will it work? with E3, I can't get into the engine with diagnostics again and the engine + alternator lights up, I'll try to recharge the batteries, they're already in worse condition, but I'll try adblue. Does it have to go with the nozzle out as well?

@Martin Ovesný if you can't get into the engine ecu, how are you getting adblue restriction trouble codes? Sounds like you need to be checking all your power, ground and can communication to bothe the engine ecu and to the EAS pump. A stable voltage to the ecus is a must if you don't want to be chasing faults that don't exist.