Paccar MX13 Fuel Issues - Check Valve video by Dr. Paccar

A Doctor Paccar Video. The issues is a Paccar MX13 starts up after a fuel filter change and runs for 5 minutes and then dies out. Prime the fuel system and it will run 5 minutes again and dies out. No restart until priming. The engine was actually using only the fuel in the fuel filter housing. The fuel was not going into the fuel filter housing and it is NOT the fuel pump. The check ball in the fuel filter housing ended up sucking inside of itself blocking the fuel port
Here is a link to my new video with a Paccar MX13 Complaint of intermittent Loss of throttle / no throttle response / Lack of Power / No Acceleration kzbin.info/www/bejne/enyUl4OrlK6mpbc

[@Dakman]

Make sure you remove the ball from the green piece. The green piece must be reinstalled.

[@kytrucker311]

Just changed my filter and removed ball green thing and cap...and started getting check engine light stating low fuel pressure....guess I need to put green thing back in and cap...lol

[@CarlosDieselElectric]

Great video, this really helped me out when I performed a service on a MX13 and had the exact symptoms after I changed the primary fuel filter. Noticed the white ball had dropped into the housing. Followed your video and no further issues. Thanks again.

[@nwdieseltech]

I also noticed that you have the ten micron filter in your DAVCO. The ten micron is meant for a Cummins powered truck and the 25 micron is meant for the MX. We have seen where having the ten micron in place can cause fuel restriction on startup resulting in P0087 and potentially a rail control fault. The ball you are talking about is referred to as the 'No Filter No Run'(NFNR) ball and will stick like that when some additives or biodiesel are introduced into the system. This blocks the flow of fuel through the standpipe resulting in the exact problem you are describing. Nice investigative work and good video.

[@Dakman]

Thanx for the added info especially on the filter microns. We were primarily a Cummins powered fleet until recently and wanted to try MX13 engines.

[@vasiliy2394]

I'm planning on getting a T680 with an MX, how are yours doing now?

[@mcedillojr]

Ran into a low fuel delivery pressure problem P0087 this video made my day. Thank you

[@lyndsifoster7582]

My man had this issue today, so grateful that you made this video. Thank you! This engine has been nothing but a NIGHTMARE!

[@Dakman]

You are welcome.

[@yamahaking6137]

Great video.. I do all my truck service by myself but this time it wouldn’t start after changing the fuel filters so your video saved me a lot of time! Thanks a lot chief..🙏🙏

[@alangarcia4446]

I was having trouble priming the engine and even though I don’t have the check valve issue. The way you showed to prime the engine was phenomenal. I have seen a ton of methods and this one is the best and fastest!

[@rayblackburn7271]

We ran into this today, found your video while trying to figure out the problem, got it cranked right up afterwards. Thanks.

[@Dakman]

Glad it worked out for you. Seems to be a common problem when they get some miles on them

[@92174164]

Exactly what happened with me... This video saved the day

[@jasonayres7031]

Had this issue I came across your video and i did the same thing and its running now....thank you!

[@edjahman]

Thank you for this! Unfortunately, I got some bad fuel the other day and this was a giagantic help. Someone already took the ball out.

[@100libre2]

Excellent video yesterday I solved my truck that ball made my truck lose power and behaved like a derate I went to workshops and they wanted to change turbo injectors and many more things thanks to this video in a few minutes I was able to solve the problem no more ball

[@frankster1969]

Awesome video. As a new owner of a14 Pete with one of these motors this might save my a$$ some day. Thanks.

[@luislozano6776]

This is really informational, leaving a comment for the algorithm

[@92174164]

Thank you you saved my butt.... Have a great new year

[@mattt3284]

Many mx13s have a small filter in the primer unit that can clog. Unscrew, remove, check and replace if needed. The check valve is one I didn't realize can be blocked! Appreciate that heads up! Not one service tech I've watched that took 20 mins to prime my filter turned that bleeded valve, or checked check valve or primer filter!

[@Surazk]

Totally works.... You saved me money. Very Nice piece of info. Thanks man

[@Dakman]

Glad to help

[@albertocazarez9860]

Desde Mexico. Gran video solucionamos la falla en carretera gracias 👍🏻👍🏻👍🏻

[@AvtarSingh-ki5my]

great video you actually showed everything step by step i am getting into a 2015 pete with mx 13 so need all the videos i can to help my self as an owner op thanks again.

[@Dakman]

Glad it helped

[@AK-cx5ix]

I just got a 2016 pete 579 (paccar) drove it off the lot ran it for 2 months no problems then did my first oil change and on my first trip 2 weeks in gouges showing that my fuel filter needs replacing then 2 days later driving n had a bunch of codes comes up n check engine lights saying I got no DeF need to shut off engine to prevent damage while Def Guage going up n down from full to empty untill it settled down to how much I had in there about half a tank n started working fine now couple days later while driving throughout the days the fuel filter keeps going up n down from being ok to needing to get replaced but drive just fine untill today the fuel filter Guage is all the way in the red n now 6.codes came up I researched it basically telling me to replace fuel filter and the truck barely pulling at 50 mph so after doing my oil/fuel filters change rolled out on the road and 7000 miles later im sitting at the shop right now wit my truck barely driving 6 codes came up n im just hoping the fuel filter change will resolve this problem. Maan I love me these Pete's but all the electrical n Sensor issues are crazy n the more I look into it n read about it ppl have all sorts of problems with these newer trucks wit the Def issues or fuel issues or sensor issues and everything costs soo dam much its crazy while my dad has a 20 yr.old truck wit no Def n he never has any issues whats so ever its crazy so good luck to man I been driving couple years now n got this truck wit my dad so I could be owner operator also and withing the first 3 months of opening the truck every trip I get some codes.or little issues that pop up like my ambient air temperature sensor that just went out also it tells the outside temp but its connected to the trucks ECU computer n dealer said this little temp sensor can cause all sorts of other codes to come up n cause all sorts of problems for u n u can spend thousands of dollars at the shops n they won't figure it out so if u ever have that sensor go out or any other ones make sure u get it fixed right away cause apparently it only causes more n more issues n can leave u on the road spending alot of money like im about to do so good luck

[@PC_CERTIFIED]

just subscribed good information thanks from your fellow driver

[@ryanmall]

Thank you for the video I just changed my filters and was having trouble starting them I didn't know about that bleeder valve I couldn't get nothing to come out so I put a vacuum pump on it and in no time it started working

[@EduardoSilva-xe3gp]

Junk indeed, thanks a lot for this priceless information

[@regisquenneville7262]

Exactly the same problem I ran into! thanks for the video!

[@tolgaozcan5704]

My Mecanic told me to do this trick and also watched this video I really appreciate for this I solved my problem

[@idksht]

Did you remove the whole green piece with ball or just the ball itself?

[@wenpathh3368]

Thank you! Thank you! Thank you for this information. A great help!

[@Dakman]

You are welcome. Took me about a 1/2 to figure out what went wrong.

[@edgarcapacete5394]

Awesome tip man, thanks for sharing.

[@Dakman]

You are welcome

[@HerbertDPayne]

Great video, many thanks.

[@Dakman]

Our pleasure!

[@romanmakarov7140]

Thank you, man!!!

[@eddierivera8763]

Thanks a lot man

[@Therock-tl5kz]

You saved my day thanks

[@Dakman]

Glad I could help

[@xsentrik1107]

Thanks for the video man I learned a lot I have a 2016 t680 and it runs like a charm 600k on the clock but I did notice today that I would be running down the road and the truck would hesitate for a second but no sirens or panic lights on the dash everything looks good there's a new guy in our shop and I wonder if he ever changed my fuel filter

[@Dakman]

Glad it helped. Your Kenworth has a fuel restriction gauge. If it's reading 12Hg or more under acceleration then the fuel filter did not get changed on the engine.

[@darkligth53]

Thank you for the video

[@Dakman]

You are Welcome

[@MrBdubsr]

Good darn info!!

[@Dakman]

Glad it was helpful!

[@willyswednesdayreview6760]

Wow saved my but! Bless ya for putting this up. Keep on wrenching brother!

[@Dakman]

You are welcome. Although some may not agree with removing the ball it's only purpose is to prevent someone from installing the wrong micron fuel filter. I have left the ball out on quite a few of our fleet trucks with no issues of fuel draining back into the tanks

[@hernansalinas713]

Gonna try this!

[@trw481]

Helped me dude thanks

[@Dakman]

You are Welcome

[@geoestrada5001]

I always buying fuel filters by the Kenworth dealer shop, never got any problems, thanks for letting us know about this issues,

[@chris25tian]

Thank you sir.

[@Dakman]

You are welcome

[@vanexpedite7017]

Great video! Can you do a video on Paccar px models engine problems? Thanks.

[@danielricketts6469]

do you show me how. to take out the sensor in the bottom of this housing. pls

[@DLSWV]

👍😉. Thanks.

[@jhondivantoque2756]

Saludes desde colombia medellin, no hablo ingles, tu me podrias dar un resumen de que hace esa valvula? Y cuando se daña que falla presenta el motor. Gracias

[@vanexpedite7017]

That fan hub may need replacing soon if mileage over 350k. Also, If fan belt starts frayng on the sides: Inspect or replace Alternator Ac compressor Fan tensioner belt pulley

[@biginmb]

Will this issue cause it to back feed to the fuel tank? When using the hand primer you can here it bubbling in the tank.

[@caliguy2650]

I got a mx 13 but my fuel filter dont look like that its a gray metal one

[@ryanthackwray5390]

I wonder if my 2018 t680 with a paccar has this ball?

[@josephpena9528]

I took my truck to the shop for an oil change and fuel filter replacement and when they replaced the filter i truck wouldn't start for this same reason but you would think the mechanics there knew about this but not. it took the HOURS to figure this out and ended up charging me 2,300 dollars for the job.

[@juanrinconjr8670]

What if the ball is in side the black tube how do you take it out ?

[@ryanpersaud6567]

So I changed mines today but your video explains so much more my problem is I don’t think I primed it properly I manage to get it started and my check engine light came on

[@Dakman]

The check engine light will come on if the fuel pressure is too low for a certain time period. Once up and running the check light should go out after so many drive cycles.

[@idksht]

@@Dakman question should only the ball be removed or should the green piece and ball be removed ?? Thanks

[@boblembke5256]

What is the part number of the bleeder?

[@user-lf2wp3em7j]

we have truck with mx13 keep giving problem with fuel restrict filter. keep getting same problem from 7 months it is new truck 111k miles .We went to different dealership spent about 18k on it they always clean fuel tanks and change fuel filter,sensor,def filters. still not found problem

[@rc5693]

This issue will not always make truck not start. It can still run but be derated because of low fuel pressure. So if you can't pull much over 20#'s of turbo boost check ball

[@sertangunduz34]

That ball on my mx13 dropped inside the canister already I don't know when it happened I just left it like that put new filter on and go

[@marouantahir8633]

Hello, can you change? 2124494 DPF Differential Exhaust Pressure Sensor Fits DAF LF CF XF Euro6 Various

[@JakeSnake-pt2pp]

Thanks had truck die along road side changed filters went about 5 miles died again Remove check valve problem solved

[@Dakman]

Glad it helped you keep trucking

[@alphasquad4464]

Bro mine is different my paccar has that fuel filter on to and my primer pump is red next to the engine were do u think my check valve is at?...

[@dillonandrews4083]

Although it's quite a late reply, your system does not have this check ball. This check ball is there to block fuel supply if there's no filter element installed. Since the earlier models use a spin-on filter, they definitely would not be able to run without a filter installed.

[@Dd-760-]

Ever seen that check valve fall in the bowl and cause problems? I couldn’t fish it out and it was blocking a line. Took a while to fish out but once I got it out the engine started right up.

[@garoleyva00]

How did you get the ball out

[@almahdiyoung3660]

I have a 2016 mx 13 and in the past wk I've been experiencing an increase in fuel consumption. My average dropped down to 4.9 from 6.8-7mpg. Possible causes. Along with some pwr loss

[@manavjeetsandhu165]

Following. I have the code P0094 with P1515 and P1496. But all are inactive.

[@gmuney9792]

It also keeps the fuel from back flowing into the tank. So as the truck sits it won’t have any fuel in the fuel rail. So you will have to continue to prime it.

[@Dakman]

Not true. Once the engine is primed it stays primed unless you have a issue with the actual check ball, This plastic ball has nothing to do with keeping the fuel system primed. All of these balls have been removed in all of our trucks and yes some sit alot and not once did I have to go out and prime the system again. All this plastic ball does is to cut off fuel supply if you install the wrong micron fuel filter.

[@dillonandrews4083]

The anti-drain back valve on these engines is actually located under the hand primer pump.

[@Amarillobymorning777]

I learned a lot from you.

[@godwinzaah1401]

@@Dakman Have learn a lot from you bro

[@jaimecruz5367]

Part # for check valve ??

[@morgandelaware7269]

Big question could this check ball stick causing back pressure on the pump causing the 2 hold down bolts to break

[@midnightrider1854]

If you are talking about one of the unit pumps, then no. The problem is a common one. We have had two trucks in a month do the very same thing. The mounting bolts somehow came loose whether they weren't torqued properly or whatever. But as they loosened, the pump continued to work itself loose until it broke both bolts and threw a few codes and caused the truck to break down. To this day, Peterbilt still has not given us a reason for this issue.

[@cihan9630]

Mein Daf xf gibt plötzlich Vollgas, wenn ich morgens das normale Gaspedal drücke. Was wäre der Grund?

[@mali7183]

Hi, You don't need that rubber either.Make a flow greater.Level of fuel in fuel housing is measured by check valve tube.Just to help all Truckers 😀😀😀😃😃😃😃😃😃😃😃😃

[@user-jg3gg3px6i]

Приве.У меня тоже запускается толька эфиром после замена тотже фильтра от чего может быт?

[@Jrddng06]

So I just replaced a filter and check valve ....problem was losing prime...manually priming was pulling from the upside down fuel water separater housing then when i stopped priming it would refill the fuel water sep filter. Primed with filter off got bubbles installed new check valve with ball primed with screw loose got straight fluid...truck ran for about 20 mins then lost it again...tanks are visually both at 1/4 full What else could be the issue it's losing prime? Is there a check valve associated with the fuel water sep housing? And initially why priming did it pull from f/w sep then fill back up when stopped priming?

[@midnightrider1854]

We were having that problem on one of our trucks not too long ago and it turned out that it was the whole Prime and handle assembly. It has a check ball inside of it that was sticking open and was allowing the fuel to leak back by it slowly. Changed the complete primer assembly and no more issue.

[@user-yp9pz2sn9v]

Hello. The translator does not translate your problem very accurately. If you write in Russian, then perhaps more people will be able to tell you.

[@timmay2k]

I changed my fuel filter and ran for a minute got dark on me so I'll check to see if mine is stuck got a 2016 Peterbilt 579 mx13

[@Dakman]

We have alot of issues with our Paccar filters getting black. Using a fuel additive for algae helps

[@vasiliy2394]

What's the mileage on your truck now?

[@AK-cx5ix]

I got exact same truck wen I first got it I drove it 2 months before fuel filter gage inside truck showed it time to change so took it to the shop got it changed n wen got the truck back gage inside truck was already almost half way to dirty does anybody know what thats all about shouldn't it show zero wit new filter ?

[@tomywrobel6428]

I have issue with fuel in my paccar 2018 what i found out when idling everythink is ok but when go down the road it shots off and another think i see there is problem with fuel level in tanks passenger empty driver full what could it be is that damn white ball cuzing problems ?

[@Dakman]

The fuel between the left side fuel tank and the right side fuel tank is a equal draw system. If you use up all of the fuel in the right side tank it will quit running even if the left side tank is full because it's pulling air. If this is what is really happening there is either a blocked hose for the draw tube or the return line for the one tank that doesn't empty. Also it's important that any fuel lines replaced to the fuel tanks are made in the exact length as removed. Best thing to do is remove the fuel lines from the tank that doesn't draw fuel and use compressed air to blow through them in case something is plugging them. But to answer your question that white ball has nothing to do with with fuel only drawing from one tank.

[@rarefactorgaming7580]

Part number for new one?

[@Jackknife-TV]

I pulled it out had some dealer work don't and they freaked out because the ball was gone said I had codes for it ect lol the put a new one in charged me like $120

[@spectrescythe1597]

I have a 2018 kenworth t680 with a problem where my driver side is pulling from the passenger tank to the point where the truck dies I’ve replaced the 2 fuel splitters and also blowed air through the line near the driver side where the engine is And theres nothing blocking that line I haven’t tried the line that connects to the fuel pump that’s on the side of the frame yet But what other things should I try after that Would the supply line cause the fuel to get sucked from one side to the other???

[@Dakman]

Yes a supply line would cause fuel to get pulled from only one tank. There could be a piece of rubber inside the line that separated and is blocking the suction. Some Kenworth trucks have vents on the tanks with filters. There's a maintenance replacement of replacing those vent filters annually.

[@spectrescythe1597]

@@Dakman should I check the return line as well??? Which I’m sure I already did. the vents on the tanks are fine

[@tonyibarra2551]

I replace my filters and try to prime it but it dose not prime what can it be

[@Dakman]

Depending on the year of the engine some of those Paccar MX13 engines can be real mean to prime. Just make sure you didn't get the white ball stuck in the port hole of the green cap because if you did it will shut off the fuel flow. The white ball should not be stuck in the green cap and should be floating around freely. Next "SOME" Paccar MX 13 engines have a bleeder, I show you this in the video. NEXT the newer Paccar MX 13 engines do NOT have a bleeder. So if you replace both fuel filters at the same time you will need 2 people to prime it. First pump the primer until it's hard. But it still will not start. ONLY after you get the primier pump hard have another person start cranking the engine over and continue to pump the primer pump as the engine is cranking. It will start then. NEVER replace both fuel filters at the same time on the newer Paccar MX13 engines. Replace one then start and run the engine for 5 minutes. Then do the same with the 2nd fuel filter....Good Luck

[@mongoliangana]

will the hand pump will pump fuel into glass filter when the ball blocks fuel? when i pump with hand pump, i see fuel coming to glass pump, the truck starts, but shut up in 5 min.

[@Dakman]

Yes the hand pump will fill up the bowl. However the truck will use the fuel in the bowl and it will not refill that bowl if the ball is blocking the port therefore will empty the bowl and the engine will shut down

[@petrosdaldalyan3831]

Dakman Productions plz help have power loss over 55 mph can you tell me what to chek?

[@petrosdaldalyan3831]

Dakman Productions my moter is exactly like this?

[@ediszalic5315]

There is proper way to prime a paccar engine I am diesel mechanic I worked at kenworth it’s starts without no issue lots of place don’t know lots of places use the air vacuum pump it works but there soo much easier way

[@Dakman]

I worked for Kenworth for years myself. This has nothing to do with priming a engine. This is a issue where the engine runs until it empties the fuel filter housing and doesn't keep it filled. That white plastic check ball gets flat spots and eventually gets stuck closed. It's only there to force you to use the proper micron fuel filter. But causes more issues as the mileage racks up. So we just removed the plastic white ball and have had no issues.

[@georgeshaver7759]

I would like to ask you a question. My 2015 KW with a paccar engine has been in the shop for 9 months and it seems like no one can figure out the problem. The truck will start and idle fine, when you start to give it fuel at around 800 rpms it will start blowing out black smoke (a lot of black smoke) and will not take any more accelaration . The mechanic has check injectors, fuel filter housing, fuel pressure, fuel pump, and still it is doing the same thing and no one can figure it out. No codes.

[@Dakman]

I'm wondering if you have a cam sensor issue. I have seen cam sensors give the ECM weird information but not code.

[@WestTexasDieseldog]

this is happening to a truck I'm checking out, no codes , only revs up to about 10000 rpm with a lot of black smoke

[@WestTexasDieseldog]

any luck?

[@killerdrone]

Dose the bleeder valve need to stay hard after it has ran??

[@Dakman]

No once it is up and running that is it. Just make sure the hand primer pump is hard to push to ensure a proper prime. It should fire off. If you loose prime or if it stalls out and looses prime ditch the white ball in the video

[@petrosdaldalyan3831]

Lost power on Mx 13 hardly goes over 55 any one no what’s the problem? Plz help. Thanks

[@rulo305444]

You ever figure this out?

[@kellyfennell4559]

Reason for the new head is injector cups

[@darlingnunez4323]

hey i have sent truck t680 paccar mx13...mi fan to the inginr still runing fast....is ok

[@eezy12388]

Where does the ball come from to be sucked in the fitting like so

[@Dakman]

That ball is installed so if you put the wrong micron fuel filter in the housing it will shut the fuel off. Problem is the ball is plastic and does wear then finally falls out into the fuel housing

[@jakemartin4305]

2016 KW with mx13 unit died on frwy wouldnt start found same issue, after repairs unit would start and would die within a few min. sucking air and would drain bowl. found that the return line was sucking air at the pressure control valve and the return line which runs to water seperator ( seperator has a "blend valve") which is puting air back into the suction side of system causing it to lose prime.... worst design of a fuel system ive ever had to work on...... and FYI the mx11 are breaking rear motor mounts just something to keep an eye out for when doing your P.M.'s

[@FREDMONEY22]

I’m having the same issues mine starts up but shuts back down after 30 secs or so. 2014 kw any idea what could be the reason?

[@bandolerotruckn6784]

My 2012 t660 had the same thing happened, died on freeway .. wouldn’t start . Had air on the water separator losing prime . What did you do to fix your issue !?

[@nathanielmontalvo1051]

We remove those at the dealership all the time

[@petrosdaldalyan3831]

I have a problem with my 2016 579 pete Mx 13 paccar loss of power can you tell me what to chek please. Thanks

[@cihan9630]

Ayni sorun benimkindede var ama hata yazmiyor

[@HectorGarcia-rr7lu]

Having this same problem truck died on me on the hwy. won’t stay primed at all. My ball is missing completely and has been for months now truck won’t stay primed

[@Dakman]

The ball has nothing to do with keeping a prime. It's just there to make sure you install the correct micron fuel filter. If the micron is wrong it will plug off the port. If you can't keep a prime more than likely you have a leaking seal on the back side of the fuel filter housing. There are two ports there. One for supply and one for delivery. I have seen the seal go bad and allow fuel to drip out which causes a loss of prime. This seal isn't a easy job. You need to remove the entire fuel filter housing. Extra care must be taken when putting it back together because the port for the seal is sharp and you can easily cut the seal

[@HectorGarcia-rr7lu]

@@Dakman figured it out the water separator housing was cracked where fuel lines screw into. By passed the water separator and it starts right up every time so I’ll be replacing the housing tomorrow when I can get the parts

[@piotr3468]

Hi, I have problem with low fuel pressure. I have only 2 bars. I changed first fuel pump but it wasn't that. Have anyone the same problem? Engine is running but DPF is not regenerating.

[@Dakman]

You could have a problem with one of the unit pumps which are located on the left side of the engine or even a bad fuel pressure regulator. It will not do a regen if the ECM sees the fuel pressure is below a certain spec.

[@piotr3468]

where Can I find fuel pressure regulator? I have MX11 engine

[@gmuney9792]

thank you for the information. Do you by chance know if i can order it from anywhere else other than the dealer. if so do you know the name of the exact check ball repair kit or where i can get it.

[@Dakman]

Honestly if you just take out the ball like I show in the video you will never have another issue again. That ball is only in there so you are forced to put in the correct filer. It does protect the injectors from improper filtration in case the wrong filter is installed but unnecessary if you have your own shop and do your own repairs. The wrong micron rated fuel filter could allow debris to pass thru to cause too much restriction. We have removed all of ours in all of our Paccar MX 13 engines and had no issues

[@mikec7364]

Didn't work for me!!!

[@noornase5887]

So did u actually get rid of the ball ??? I don’t get it

[@Dakman]

Yes I took out the white ball and put the green insert back in without the ball in it

[@brahimelaalami8684]

Tradition

[@likuidrano6778]

That little ball shut the damn truck down..

[@Dakman]

Yes it will shut off the fuel to the engine

[@gmuney9792]

Ok well there must be something else wrong

[@johnnygoins6078]

What size socket for that fuel filter cap

[@Dakman]

1 1/4 socket

[@user-qc3sw4wz8c]

Не заводится DAF 106 только быстро старт пахмел завёл

[@user-xl2tf5gr6x]

Давление в рампе смотреть надо и форсунки

[@vicpetrishak7705]

Val’s truck

[@jebediahnightlinger6357]

So he's the guy stripping all the bleeder valves. Junk engines, his has had a cylinder head.

[@Patriot407]

Paccar piece of crap 💩 Cat or cummins all day

[@Dakman]

Yeah I hate the Paccar MX13. Complete junk. I'm a Cummins and Detroit 60 series guy.

[@jrrat2375]

Why do you hate paccar?

[@unforgivensometimes2947]

Jr rat they just do,like another things,no particular reason