Cummins N14 fuel problem Fix

[@richaricha6989]

Came across your video the other day, searching for my sputtering N14. I figured I’d take a chance and see. WOW, the crap that was in there. If I could show my pic of it, I would. Runs great now, thanks for the video.

[@jacobking6966]

Those check valves are a very common problem with M11 and N14 Cummins, the fitting on the right side of the ecm fuel cooler has a check valve built into the fitting to keep the fuel prime, when the springs get old they don’t push against the seat of the valve causing the your fuel to drain back to your tank, prolonged starts, or even no starts. Detroit 12.7L had a similar idea, but they placed their check valve in the back of the head to keep fuel prime. I wouldn’t advise bypassing unless for emergency. the fuel cooler is essential for cooling the ecm from the heat of the engine.

[@charleyandsarah]

@jacobking6966 Right side or left side? Everybody else I’ve seen referenced left side as in this video, do some have the check valve on the right side? I took my left side off and it’s just a fitting, no valve, maybe previous owner just put an elbow or do I need to check the right side as well?

[@misaelmoreta3600]

My truck has a cumims N14 with the same fuel pressure problem, the system was discharged. Thanks to you and your video, I have solved this problem, which the mechanic recommended that I replace very expensive parts that had nothing to do with this problem.

[@11ridindirty]

Just bought a N-14, thanks for the video. I will probally just replace the one filter, and remove the check and clean it before I put it in service.

[@victorcuadros7593]

Today I replaced the small wire filter you mentioned and problem solved. Thank you very much for the info.

[@sooperamee1]

my big trucks check valve was totally jammed...Too bad that I spent $1800 & still no results from 3 dealers service depts. None of them even came close to mentioning this valve...Shame on them taken advantage...thanku for info or I would still be stopped

[@AndersonERockefeller]

Dealer will never tell you about that check valve unless you are a good Costumer.

[@spf1502]

thanks for the video. I have a 91 Peterbilt 378 with the N14 and high vacuum pressure while running. I had a problem with the truck losing prime and ran a hose from the filter direct to a fuel can and the high pressure went away. thank you for helping me narrow down what it most likely is.

[@michaeldunagan7838]

Thank you so much. Rare to see a guy with a Select Plus like I own posting on KZbin.

[@williamkaono1239]

Great informative tutorial. Thanks so much. I’ve got an N14 in my T800. So far no issues but in the meantime I’ll be checking those items out now that you mentioned it. Great job.

[@officecc2417]

This was exactly my problem. Looked like a plastic grocery bag got into my system and plugged the check valve completely up. Thank you for the information.

[@beachsoap]

Thanks for this video. I had fuel problems with my truck and I try your fix and the check value was dirty . Works good now !!

[@AndersonERockefeller]

I'm glad this video helped :)

[@burkevinell]

Thank you. I got my first N14 running in December and I've been having issues. I was going to pull the check valve, but I didn't know about the other filter on the pump.

[@jhonjmontoya7763]

Traducir en español

[@phillipchavez755]

That was really informative Didn't know about that one way check valve on the Elbow

[@tinchrac3239]

Thanks mate, i have a cummins 3.9 isb, i dtarted checking thw fuel filter with manual pump as those ussually get craked orings qith time, didnt knew this was the check valve, almost replaced the filter base thinking it was all inside and that was just a fitting

[@festersgarage4924]

I wish I could like this tons. You saved me so much headache. Cannot thank you enough for sharing your knowledge truck had some rubber in the check valve (no spring) cleaned it and runs like a top again.

[@sstocker31]

Nice tip there on both of those little gems. I have to say I really like how you calmly and clearly explain what you are doing and why....I'm suscribed

[@jstatrck]

I would have never known about the filter in the pump. I was going through filters cause I thought they were the reason why. But I did find lots of crap in my check valve. also. Thank you for your knowledge

[@RickyTricky3223]

That's for the tip bro I'll be sure to check out those things on my truck I barely got a western star with a N14 and your video is helpful I don't have problems with it but it doesn't hurt to chuck those things thanks

[@jwc916]

Thank you very much for the great informative video. this saved me a lot of heartache. Great job !!

[@Mando19901990]

Have the engine but im having trouble with it turning on ,it cranks but wont start. I replace the fuel pump seloniod and fuel filter and still nothing

[@kennethdixon4738]

Check your fuse by the ECM

[@HalfLifeAMD]

Fyi- The re route of the fuel lines is ok for an emergency. However the ecm relies on diesel flowing through the cooler plate to cool the ecm. To permanently by pass it..not recommended.

[@AndersonERockefeller]

In the video I rerouted the fuel line just to get home till I found the problem, if continued to drive with out the diesel cooling the ecm it will end up overheating the ECM and will end up costing $1,000.00 replace plus tow. I'll post another video how I reroute the computer (ecm) and I'm using a separate cooler to keep the ecm nice and cool .

[@texasfortruthnomsm7279]

I've been working on one of my company dump truck's forever trying to figure out how the fuel drains out of the filter after you kill it very informative thanks so much for the video

[@winstonspratt5556]

Respect to the MAX... AND MAY YOU BE BLESSED...

[@trev779]

Check the fuel line from the diesel tank nearest to the exhaust pipe if ur still having problems. Ours was cracked and would drain the line from the coolant exchanger whenever down. The truck would start with full tanks but once the level got down to 1/2 the path of last resistance was thru the broken line from the frame to the tee connecting the other tank

[@trev779]

I wouldn't recommend bypassing the computer as the diesel cools it.. A way you could check flow thru it is remove the big fuel filter then go to the coolant diesel heat exchanger and take the fuel outlet off and blow on it.. Should be relatively easy to remove gas

[@reltcl1995]

Yes sir I have a case 580d backhoe with a 4 cylinder Cummins can you tell me where it would be located on it and it's a vacuums line coming out above injector pump from intake

[@STAFFORDTRUCKING]

I'm having some of the same issues missing at low rpm only under a load. I also have a issue if it rains the truck will cut off and you have to put a hot wire on the fuel solenoid to get it running. We have tried for a week to figure it out. Also SOMETHING Weird If You Hold It On THE Floor It Will Turn 1400 Rpm As It Suppose to. If you give it 20 seconds or so it will start jumping then bam it tacks out which its not suppose to do sitting still. I by passed my plate about a month ago not knowing about check valve. I'll fix that asap. But I need help on the other issue. The ran deal throws me off

[@markdreading631]

Might be the computer…

[@kennethmorris58]

ECM check valve blew a hole in the line I’m assuming because it was leaking and bubbles of diesel was coming out after it shut off

[@edotrucking1]

Nice , like to ask you or any one how Know about N14 I have no power coming to the crank sensor it a 4 wire crank sensor what I understand need battery volt Ground and 2 signal going back to the computer ,,, my problem I get no power and no ground , I do have the bise signal on all 4 wire ,

[@andrewdrumfire8023]

your ECM might be fried , try to connect a different ECM and see if that solves it

[@edotrucking1]

@@andrewdrumfire8023 thanks truck start a month ago just like that , and now is no start again, now I will check the fuel pressure , my crank sensor get 2.5 v on all 4 wire don't know if it ok or not , sensor is new ,

[@andrewdrumfire8023]

Check voltage to fuel shutoff solenoid, if voltage too low or no voltage = no start It's $80 or so , I'd change it if it's old

[@andrewdrumfire8023]

Also , when crancking, what your tachometer look like, shows 0 or 100-200 rpm ? If 0 - check power supply and ground wires to the ECM , check wires to your engine positioning sensor. If 100- 200 rpm on tach change fuel shutoff solenoid and check voltage

[@mohamedalladin5784]

Hey man, u won't believe it but after i spent about $3500 on this truck and it still had the same problem . The dealer said to change the throttle, same problem then they said to change the tps and idle validation switch then it works, after all it was the validation switch,

[@tomeczek1955]

And now I know where it is. Thank you for great video!!!!

[@sergiocarapia8901]

I have a 2000 peterbuilt I got a truck that has been sitting for 10 yeas when I try to turned it on it dem like it’s starving for fuel I did change the filers and new fuel but aits just cranking and cranking but it will not stay in , any sugestión ???

[@modernemployeesuccess]

Hi, Is it the same way we go about solving a Cummins M11 fuel running back and making it hard to start?

[@rudivanniekerk8095]

Cool Video . It's not Pressure it's Vacuum. Vacuum is measured in Inch Mercury .

[@AndersonERockefeller]

You're probably right I'll have to confirm my checking the line to see where it's mounted.

[@dronetrucker]

Fuel filter drains on my n14 I have the clear see thru filter system, I don't see the elbow behind the ECM

[@haroldsgarageo4822]

Any idea on black smoke at accelerating only, engine was just rebuilt, new everything except 3 injectors, doesn’t loose any power just to much smoke every time I accelerate.

[@ismaillas848]

thanx boy for that Nice video, have got the samedi problem within an N14, And after spending lots of money i foond a guy that solve it the same way. thanx

[@loganadams5520]

Can you tell me hoow to check for a bad ecm. I have good crank but won't fire up. Everything u showed in the videos is good. New fuel pump. I'm not getting power to the fuel solenoid either. I jumped it heard the solenoid click but still won't fire up

[@crazyvideos421]

Logan Adams Possibly replace crank senser.

[@loganadams5520]

Crazy Videos ok thanks alot..

[@loganadams5520]

Location please..

[@crazyvideos421]

Crank Sensor is located next to air compressor and oil power steering pump. It's roughly $40 bucks to replace often goes bad

[@crazyvideos421]

Logan Adams kzbin.info/www/bejne/kJbHqKesjbhnqZI

[@williamwinchester792]

Sure info mate, well done. Love your work.

[@rondalgliesh8732]

I have a m11 only runs at high rpm 1500 ,,thinking fuel filter in pump ??

[@fernandochavez7330]

How do you fix that problem?

[@larryhenry7299]

i have a problem with my pete the fuel keeps running from the right tank over in the left tank what could cause this problem?

[@jameserickson2523]

Larry Henry check your tank air vents one is clogged

[@maximus5908]

Thanks bro resolved my problem with the check valve

[@officecc2417]

My N14 had a straight nipple in it instead of the elbow nipple but it was still the same check valve mentioned in this video. It is located in the same position as this video shows. If your filter is sucked dry when it starts and then dies, then this is most likely the issue. It is a very easy fix and will save a lot of money by doing it yourself. If you change your filter and still is starving for problems then this check valve and the screen in the pump could be your problem.

[@germanrodriguez6979]

I have trouble getting my truck started it cranks up for about two minutes and if I add starting fluid it starts right away it only does that the first time u started after that it’s good to go would this check valve issue this problems?

[@heavywreckoning7864]

Cam position sensor. $35.

[@jesustiochuy]

Sup bro I'm working on a Cummings ISM410 And it isn't pulling fuel from the tanks my lines are new.

[@luke_zxy]

I have an n14 cummins. I have a problem with low power. I changed the injectors, fuel pump, turbo, and fuel lines. The engine stalls on me sometimes. I had the dyno test done and the dyno was ok but the engine is still lacking power. What can I do?

[@dustinhuffman574]

Call Michigan turbo ask for jay...ask for a quick spool turbo...cost about 12 hundred or less if you have a core...he machines it all himself...it added near 55-75 hp...insane difference but don't over rev...never go over 22 hundred...major difference..night and day difference call him

[@1crazyp1]

Thanks bro had heard of that check valve but could never find it thanks for sharing

[@vicpetrishak1077]

The strainer can be easily cleaned with either. When metal shavings are found here , it is a sign of fuel pump failure or soon failure .

[@banditboycycles]

is regular celect suppose to have a check valve, it looks a little different from celect+, im loosing prime in my truck, took apart the fittings off heat plate and there is no check valve, wondering if there should be one. Its 1995 N14 celect 435hp

[@AndersonERockefeller]

Check the diesel line connector that connects to the pickup tube.

[@AndersonERockefeller]

it's on top of the tank.

[@andreychuprin9956]

+Anderson E Rockefeller thanks I'll check it out

[@renoali7731]

I have the same Engine an a Kenworth truck My problem with my truck what it drives the truck shut off but when the truck is parked the truck keep running I’ve change the fuel pump still the same problem only while I’m driving I’ve change the fuel filter’s do you know what it might be

[@bobbywhalen1593]

I have an in 14 Cummins when I try to hold a steady idle of 20 to 30 mile an hour truck has a bad Miss loads up in fuel and blows white smoke once I sell her 8 past that point and hit the open road she runs fine any ideas what could cause this been in three dealerships change the wiring harness ECM fuel throttle sensor

[@andrewdrumfire8023]

got exactly the same thing man ... did you ever fix it ?

[@tcmtech7515]

Just do like the previous owner of my T800 did. Just disconnect everything that doesn't work. My truck when new came with every bell and whistle option they had, but when I got it was running on bare minimal anything. 100+ hours into it and I have about half of the stuff working now.

[@melanieleonard6058]

Anderson,For the last couple of weeks my truck was starting when the motor was cold but wouldn't start after it was hot, now it won't start at all.?? Any ideas why? Thank you

[@bencodey5454]

Having a similar problem in a work truck think it’s a check valve, it runs happy when you spray three cans of ether to start it other then that it just cranks and cranks

[@The-Harpy-Slayers]

Hello sir whats the part number on that elbow

[@ajw.9690]

Do you happen to know what the fuel pressure should be at the spin on fuel filter and if that clogged port raises the fuel pressure. Having issue of bloating filter

[@ramon18881]

Anderson I got a n14 like yours and it takes while to start what's the fuel solinoide do its on your video it's the red one by pump

[@AndersonERockefeller]

No , the red solenoid only shuts the fuel off and on, remove the diesel filter and if its half way empty fill it up with clean diesel and reinstall,make sure no dirt falls in and try to crank the truck, if it starts easier you have a problem with fuel draining back to the tank as the truck is shot off for a while.also what kind of truck do you have? example mine is a 98 Kenworth t800 with the N14 and i have an single 150 gallon tank on the passenger side and the main fuel line (supply line) that screws on the tank sometimes gets loose and that will cause to pull air instead of fuel from the pipe that goes all the way to the bottom of the tank, this can also cause random stall or shut down while driving and it needs to be cranked for over a minute to fill the diesel filter back up.

[@juancarlosguzman1898]

Hi Mr Anderson thanks four your video i have an engine that in low revolutions works perfect but when the revolutions became faster it starts with the failure it seems to be an inyector trouble , i already check them and the 6 inyectors are fine, so i dont know what to do can you help me?

[@allenpardon8211]

Is there an o ring on the cap for the filter on the pump?

[@daleborland2262]

Wat would cause it to shutdoun filter is not emptt but when loosen iair comes out tighten it and it starts right up

[@pnltriteniidejos7748]

Whats the best way to bleed a N14

[@weirdo1204]

Is there only one fuel supply line? Or is there another return line or is the main hose the supply too

[@AndersonERockefeller]

That's the main fuel supply to the fuel filter and fuel pump.

[@gurwindergakhal]

Hey it takes a long time no start I don't really know can you help me?

[@marcusjonesful]

im having stumbling problems in between gear changing then smooths out after about 5 sec. can this may be the problem? im going to do what you did on this video...... thanks. 92 freightliner with n14

[@felixgarcia5954]

marcusjonesful did you ever fix it? if so can you tell me how?

[@Circross]

Can anyone give me a link or part number for the fuel check valve please?

[@argenisdominguezmolina5981]

Great video!!!!, easy to follow, very useful tips, clear voice and video image.. Two thumbs up

[@millertyme2222]

The line u bypass from the fuel filter do that help I see u ran fuel lines and that that u shape one out

[@AndersonERockefeller]

The reason why i bypass the check valve and the cooling plate that's behind the ECM is because i'm running different types of fuel and it has to be very worm in order to burn right and if its very worm it not good for the ECM , now i bypass the ECM and i also ran different lines to the ecm using a small radiator with an electric motor to keep the ECM cool (i'm using entifreeze in the new cooling plate) , do NOT bypass the ECM plate cooler with out cooling the plate cause eventually it will burn up the ECM and will cost you tow plus 1000 dollars for a new ECM.

[@AndersonERockefeller]

Herbert Stephens Did you replace the small diesel filter thats in front of the fuel pump?? its a very small filter about 1 inch and thats there in case when installing the regular diesel filter and small dirt went in the mini filter will catch anything that passes the big filter this way it wont end up in the injectors.

[@kevinhayes1620]

@@AndersonERockefeller whats the part number for the small fuel filter in front of the ecm

[@Jehu0309]

my n14 had the same simptoms stalling and no power. when i took that part off it didnt have a check valve inside. what does that mean. Is this the reason for my problems?

[@Jehu0309]

Jehu Rodriguez update i replaced that check valve. my truck is still stalling and doesnt start untill i add more diesel to the fuel filter. I checked the cam sensor and its good. I also have a new fuel pump installed

[@AndersonERockefeller]

I removed my check valve and never had a problem but then again all my fuel lines are costum for dual tanks since I use alternative fuel. remember if your fuel lines are more then 15 years old must be replace to prevent air getting in your fuel do to cracked lines.

[@AndersonERockefeller]

Jehu Rodriguez Change the old diesel fuel lines, most likely you are getting air on the main feed line that goes from the tank to the pump, before you do this check the connection that's on top of the tank, i had a leak right where it connects and would give me random stall and couldn't start till I filled the diesel filter back up .

[@noellozano9991]

Mine has a straight nipple check valve with an elbow fitting behind it...... that's how it was when I got it, what are the chances someone thought that the straight nipple was just a regular nipple and added that elbow check valve nipple on to it....I know the straight nipple is a check valve because ive changed it once before

[@mystamike6663]

Is there a primer on this engine?

[@michaelgoldman4019]

Hi Anderson,love the video.Jast wandering if all this work for ISM Cummins? Thanks

[@AndersonERockefeller]

I'm not sure on other Cummins since I only have the N14 .

[@mirzetkekic9897]

I am having problems with my N14. I couldn’t start the truck it was turning but just wouldn’t start, so I used starting fluid and started right up. Mechanic cleared fuel lines and pump filter and was fine for 3 weeks. But again I’m having problems its turning and won’t start up without starting fluid, I am arguing with mechanic just to replace fuel pump and keep telling me they have to check for something else before they replace fuel pump Any help would be really appreciated Thank you

[@lifestyleofmario9171]

Its the fuel pump I had that same problem.

[@ernestoramon3700]

You earn yourself a subscriber 👍. Great info

[@1984wcooper]

The fuel is routed through the ecm to keep it cool

[@noelantongiorgi9510]

I want the filter # to purchase

[@mohamedalladin5784]

ok,they sent me another ecm ,install it drives fine, now four way flasher won't operate when ignition switch is on the on position, also when the head lamps switch turn on the radio and fuel gauge turn to on . This morning the driver was going to work and the stop engine light came on , no acceleration, darn.

[@AndersonERockefeller]

Sounds like you might have a harness issue. after 10 -15 years harness is recommended to be replace, that's my next project if I start having issues.

[@paultrif6753]

Anderson E Rockefeller , I don't have a fuel pressure gauge, but my problem it's that the truck feels like is chocking when I shift gears and hit the gas pedal. I had no issues until I washed out the engine. What do you think , I though about the harness, but I said I better ask before spending 1000$ Thanks

[@cesarcastillo6323]

Gracias nadie me dijo del filtro pequeño al final de la bomba en estos momentos tengo un N14 que se baja el nivel del filtro y no arranca 👍

[@diegofelix5130]

Isx engine have same thing?

[@mongo731]

Great video Eddy, thanks for the tips!

[@Elsalvajerodriguez]

Hey man my N14 have a same problem a will chance that litle firter maybe thats is the problen

[@paulmeyers2175]

you sound like a man who may be able to give me an idea on a problem with a n14 in a farm tractor. early n14 eng#11794334, man date 12-95. 425 horse. when im running thru the field pulling a plow of some sort it will change rpm's on me. I do most of my pulling at 1700rpm, out of no where the rpm's will drop to say 1500, almost like I changed the throttle, then out of nowhere i a completely random time frame the rpms will return to normal, or if I had moved the throttle to bring the rpms back to 1700 they will jump to say 1900. its done this for awhile and I can find no pattern. I checked the tps and it seems to be fine, but who knows what happens when working?? could this be a pump issue? the motor runs fine for the most part. good power, normal fuel consumption, doesn't miss at all. she is a lil cold blooded, but so are my big cam II's and III's. Any ideas?

[@AndersonERockefeller]

Does this truck have an electronic pedal ?

[@paulmeyers2175]

+Anderson E Rockefeller yes

[@AndersonERockefeller]

Raise the gas paddle up and make sure the wires are not pinched underneath the pedal (spring), I had this problem before where the wires were pinched and would get random RPM raise and then random stalls ( engine would die )

[@_dark__light_9806]

How can I adjust the idle...

[@derickpelletier5763]

Doesn't That heat exchanger help cool the computer?

[@JesusHernandez-pv7cd]

I replaced my check valve and it still has a lot of trouble starting every morning.. does anyone know if it might need valve adjustment ??? all help is appreciated

[@biffrude828]

Jesse Hernandez

[@MrGwb1232]

you should clean the cooling plate behind the ecm as well.

[@terrismith4061]

Thank you. Very well explained and helpful.

[@pepepepe5710]

Great video, thanks for the info, it really helps.

[@TheWESTSIDE35]

Man thanks alot I'm gonna replace all these items just because

[@adolforuiz4217]

Gracias amigo no sabía de esa válvula ❤

[@motorhead6763]

thanks . I found a similar check valve and screen in a payloader . No one fix. Dealer gave up. Any engine that is hard to start I put an outboard motor fuel line primer ball between tank and pump. I prime until ball is hard. Motors fire right up. Mack E7 has same issue. Check valve leak back to tank. Thank You

[@anthonyoliva1492]

I have an n14 Cummins an it idles at 1100 rpm what's wrong how can I fix it

[@michaelhughes5933]

So did you completely bypass the ECM cooler?

[@AndersonERockefeller]

Michael Hughes When I did this video I don't believe i bypass the ECM cooler, it's very important to keep the ECM temperature down so you won't cause premature failure.

[@michaelhughes5933]

Your video was extremely helpful to me as I work through a fuel problem on my N14. I was just trying to figure out what you said you bypassed with the new fuel lines. It's not something I'll need to do, as far as I know, but I was just curious.

[@rbox431]

Freaking lifesaver man thanks 4 info

[@leewalker3514]

Thank you thank you thank you for your advice man I appreciate it

[@mohamedalladin5784]

darn i can't believe it.i had the ECM rebuilt thinking all the problems would be solved, after that the #5 injector stop working, we replace it, now again, #5 stop working again ,we switch #5 to #6 ,it works, but we have to run it for a day. I have a feeling that the ecm wasn't rebuild right

[@AndersonERockefeller]

Rght about now would be nice to use a diagnostic scanner to pinpoint the problem because you could have a bad harness, could be the plug from the harness that goes inside the cylinder head that conects to the injector...I mean it could be Endless problems but it needs to be narrow down so you don't sink all this money in her.

[@fernandochavez7330]

Thanks men ,problem fixed 👌

[@rescuedieselrepair]

Valuable information thank you very much

[@ballacii]

Very informative 👌🏼

[@mohamedalladin5784]

my next step is to check the pick up tube. we replace an injector, I have a feeling that the mechanic didn't adjust it right or something came loose, cause there's a knocking in the rocker box.

[@AndersonERockefeller]

Knocking or tapping like a lifter tapping? when I did an injector and removed lifters, rocker arms and engine brake i put it all back with out adjust nothing. since my problem was a bad injector.

[@millertyme2222]

So how did u bypass the problem

[@AndersonERockefeller]

To bypass you simply pull out whats inside that T ( check valve) and the diesel will flow with no restriction.

[@millertyme2222]

Ok my truck will start up but once I cut it off it wont start back something keep emptying my filter

[@AndersonERockefeller]

I"m sorry but that 90 degree that i showed in the video is not a T, its a 90 degree check valve and the reason for that check valve or (90 degree) is to stop the diesel for going back in the tank, i'm assuming the check valve don't work and stays open at all time so when you shot off the truck the diesel rushes back in the diesel tank, now if the check valve was working properly it wouldn't allow the diesel to go back in the tank which would keep your diesel filter full.

[@rogerstone462]

Thanks for the info, I'll be doing that next.