Dt466 losing prime. Feb 7, 2018 · Discussion on troubleshooting and solutions for DT 466 primer pump issues in school buses. Nov 23, 2022 · Navistar/International DT466 (MaxxForce DT) 7. I am guessing the DT466 is the same. May 5, 2005 · There is a group of kids here at school who just bought a '92 school bus with the 466 coupled to either a 4 or 5 speed automatic and they are complaining of not having any power. I have it stripped to the frame, and I will be putting a '65 F700 cab onto it. It happens randomly some times it'll go weeks no prob some times every time I shut the truck off even if only 30 sec. Pre-egr and single engine mounted ecm no idm. Replace the fuel in the tank Jun 13, 2023 · This article will cover the life expectancy and common problems of the DT466 engine as well as some of its features you should know. The problem has happened twice before if I let the truck sit for 3-4 days it turns over but acts like it is not getting fuel. I tried to prime it, but the primer pushes to easy like there is no fuel in it? Thank you for any help, Joe. It seems like the pump is losing its prime. So we need to fix it. Not real familiar with what does what around the fuel filter/hpop area. Also would like to know where the to test the compression at, it is a 93 mechanical dt466 Thanks for your help in advance Dec 15, 2010 · 1992 dt466 dying - School Bus Fleet Magazine Forums Feb 17, 2020 · The rust bucket plow truck is back in the shop! The truck does not like to start since I worked on it and it's my fault. Does anyone know of a check valve that may be leaking back or anything else that would be a likely place to start? 1996 Int 4700, 175hp DT466, 5 speed, 2x rear end, service body 2001 F350 SRW flatbed, 4x4, crew cab 1978 International F2275 Dump Truck 1996 NH LX665, steel tracks on foam filled tires Nov 11, 2021 · International DT466 – ENGINE SYMPTOMS DIAGNOSTICS – Priming Fuel System CAUTION: Do not add fuel to the fuel filter header. Replaced the prime pump, running strong again. It has a DT466E 250 hp motor. This can add contaminates to the fuel. So, I tried it again, this time I got around the block twice and it died again. For best diagnostic results use Navistar Engine Diagnostic (N. Sep 6, 2023 · Learn why your International truck may be stalling when driving. Stop paying for the dealerships parts installer's guessing and look around. When I purchased it I knew it would need a little work, it sat for a year, steel tank had rust, so the tank was replaced with a aluminum one. Aug 7, 2016 · Bus cranks over great, ran great just a month or so ago, but is not starting today for some reason. If it loses prime (which happens whenever you change the fuel filters), it can get to this partly-primed state where it will push SOME fuel to the injectors, but not enough to start. Aug 11, 2015 · Got an 01 int 4900 with a DT466 HT with a crank no start with no attempt to even try firing up. ) software with NEXIQ2 adapter. Customer: I replaced the injectors on my Dt466 International motor about a year ago and also changed the metal fuel lines from the primer pump to the fuel pump. Mar 8, 2006 · DT466E Service Questions - School Bus Fleet Magazine Forums This page was generated in 0. I had the pan off while I fixed up a leak, then I buttoned it back up but never put oil back in it for a few months. Are these related to the poor engine performance . Aug 7, 2007 · My uncle has been having a problem with his international tandem truck. Plus it's leak Dt466 Losing Fuel Prime Webaug 7, 2007 · my uncle has been having a problem with his international tandem truck. Replaced the clutch fan & radiator A blog about diesel engine diagnostic and repair. With horsepower ratings ranging from 170 hp (130 kW) to 350 hp (260 kW), the Navistar DT engines are used primarily in medium-duty truck and bus applications such as school buses, although some versions have been developed for heavy-duty regional-haul and severe-service Dec 20, 2006 · My truck starts for about 10 seconds really rough then stalls out. which included new electric pump. Apr 21, 2008 · You may have a scored front cover behind the oil pump and won't allow pump to prime. Jan 25, 2013 · 2006 International 4300 DT466 drl headlight issue I work for a vehicle and semi-truck electrical repair shop and I’m having an issue with a 2006 International 4300 DT466 . The first time it happened View and Download Navistar INTERNATIONAL DT 466 service manual online. as in longhoods post I think you need between 35-50 psi in fuel rail. and yesterday it wouldn't get it's prime back. my rail pressure is somewhat low, but overall performance and fuel mileage is still as good as ever. Apr 15, 2008 · I have a 1999 4700 with the dt466e. Engine rear. #1 - I started my dump truck the other day and got it dug out of the snow. However, my truck loses prime overnight. Thanks ! Nov 13, 2015 · We are having our 2006 4300 (DT466) towed for the 3rd time. INTERNATIONAL DT 466 engine pdf manual download. Forum for diesel and truck repair problems. 3 Powerstroke. As for the spitting/sputtering, check all the usual fuel filter,strainer,check ball and hoses. I would definitely pull the sensor after sitting and see what comes out. I've changed orings in filterhead put on nicktane adapter also pressurized the tank can't find the leak. The market is back, the money is rolling in, and the wheels just keep on turning! Direct deposit every Friday. I have a 2003 International 4300 with a DT466. Inspect the thermostat for proper opening; a stuck thermostat causes overheating. Inspect the lift pump and fuel filter housing for leaks or damaged seals. It only has about 20k Dec 22, 2014 · I have a dt466 that is a slug. The highbeam headlights, markers and all other lights function properly. Is the transfer pump part of the priming pump assembly? Thanks in advance. I having starting problems I am losing my fuel prime. the truck ran, but was slugish on hills and had a Apr 13, 2013 · Hi I'm really hoping someone can help. Mechanic's Assistant How Can I Fix My International DT466 Not Keeping Its Prime When Starting? Mechanic's Assistant chat Customer: My international dt466 isn't maintaining its prime when I attempt to start it. Our regular mechanic ckd at the EGR Valve, and at the air brakes system, the oil, and Nov 13, 2015 · We are having our 2006 4300 (DT466) towed for the 3rd time. New priming ball and priming stick, New fuel filters, replaced all the o rings and gaskets on all the lines. com: Rawze's ISX Technical Discussion and more / Big Truck Technical Discussion / ISX Related Help / Losing prime overnight/fuel pressure problem Apr 7, 2023 · 2009 maxxforce dt466 no start Discussion in ' International Forum ' started by 4x4k30, Apr 7, 2023. 1) Engine breather tube. View and Download Navistar International DT 466 diagnostic/troubleshooting manual online. What is the proper starting procedure on a warm day? Should I give it a little gas while cranking it over? The Navistar DT (Diesel Turbocharged or Diesel Turbo) engine family is a line of mid-range inline-6 turbo-diesel engines. There are five common issues and some related problems to consider. Losing fuel prime overnight usually indicates air entering the fuel system. Damn thing loses prime 2012 International 4300 MaxxForce Fuel System Losing Prime Issue 4300 often faces fuel system losing prime after sitting and difficulty maintaining fuel pressure. Feb 12, 2019 · I only pre-fill fuel filters, and only if they don't have a manual prime pump or electric lift pump. - School Bus Fleet Magazine Forums Feb 17, 2019 · As long as you're not having any issues once you actually get the bus started, yes. Losing fuel prime overnight usually indicates a leak or air ingress in the fuel system. Jul 22, 2012 · Building The Legendary Navistar DT466 THE INTERNATIONAL/NAVISTAR DT466 It's also ironic the post that brought up this old topic is not about the inline 6 cylinder DT 466 but the V-8 T444E which is better known as the 7. And yesterday it wouldn't get it's prime back. I am assuming I need to check the return line that goes from the back side Customer: I have a 02 ihc 4300 w a DT466 that is losing prime and is a no start now. International DT 466 engine pdf manual download. Fuel psi is at 60psi while cranking. Primed it and she lit right up. duty diesel trucks - a 2006 International 4300/DT466 that is losing coolant in some unknown way. The DT466 engine is renowned for its durability and performance in heavy-duty vehicles. I just had all the O-rings on the injectors replaced along with the wiring harness that goes to the injectors. Mechanic's Assistant: I'm sorry to hear about the fuel issue with your International DT466. It then dies, but will start back up and do the same thing. anyone one have any ideas? a tech told me a possible prime problem but I cant tell yet. So, here's the list of things that have happened: Coming into Dallas after driving overnight from New Orleans the bus started losing Dec 26, 2011 · PLEASE HELP Truck is losing prime overnight and hard starting!! Jump to Latest 54K views 37 replies 18 participants last post by Cleftwynd Jan 15, 2012 BlackMaxxx Discussion starter Jun 7, 2023 · I have a 1999 DT466E that has been a nightmare the last two years. I cracked the lines and I am getting fuel to the pump from the primary Sep 17, 2011 · I assume it is losing prime somewhere. My take on 466E HUEI troubleshooting Sep 15, 2014 · Maxxforce DT fuel delivery pressure - School Bus Fleet Magazine Forums 4300 DT466 often faces radiator clogging and thermostat failures causing engine overheating. Had a rebuild kit sent in and did the whole shebang. Now once the truck gets up to running temp it starts to sputter/miss. It doea tey to crank when I prime it but its not getting fuel. I replaced return lines, caps, and fuel filter. Last year a rookie driver had the truck didn't notice the truck overheating and scuffed a liner. I've 1997 International with a DT466 Engine lost prime because primer is leaking. fuel pressure is good at key on and cranking. DT466 Diesel Engine: The Navistar International Legend The DT466 legend crosses into the industrial, agricultural, and truck realms. Inspect the lift pump for proper pressure and check injector seals for leaks. i guess my question is are these engines so dependent upon air flow Mar 2, 2024 · More than 3 seconds. Turns out my hand primer pump is bad. Both are '88 Int. Also, on a DT, Heui system, having low oil pressure might produce issues. No deductions, no micromanagement from fleet owners or managers Mar 28, 2011 · I need some help. Changed my fuel filter and now it won't start. Ok before you start the way I know it it’s the prime is if I back in to the driveway ass in the air she starts right up. Maybe the HPOP is worn out. I checked the fuel rail to make sure its not leaking, and snugged the bolts down. Inspect the fuel lift pump diaphragm and injectors for leaks. I didn't see any leaks anywhere. The only codes I get are 111 and 626. Nov 21, 2013 · We have an older mechanical 466 in a 1992 IHC 4900 that is losing its prime and running rough and stalling. Have a 2004 international 4300 has the dt466 engine will not on it's own need starting fluid like fuel losing prime. So, got a 2002 DT466. Took it off, put it in a bucket of water and tested 4300 DT466 often faces fuel prime loss and air leaks causing hard starts after sitting overnight. Used to start and run beautiful, probably the best running dt I've driven. Trouble codes on dash screen are 1:1 613A and 1:4 613P . The following lists important Technical Tips that will help you locate and repair common problems on MaxxForce Engines and DPF/SCR Systems. Verify coolant levels and condition, ensuring no air pockets in the system. Understanding these common problems helps in maintaining optimal functionality and 4 days ago · Rawze. Pre-filling can introduce contaminates into the fuel system which is why numerous oem's recommend against it. However, like any mechanical system, it’s not immune to issues. Cranks fine but no fuel in the filter. Inspect the primer pump diaphragm and ensure all clamps are tight. So, if sat without oil for a few mo Nov 11, 2021 · International DT466 – HARD START AND NO START DIAGNOSTICS – Test Procedures – Fuel Pressure and Aerated Fuel Purpose To check for correct fuel pressure and aerated fuel NOTE: Do the following: • Ask the operator if the amber WATER IN FUEL lamp was on during vehicle operation. I took a look at it yesterday and I am pretty sure that it is not getting enough fuel. Check all fuel line connections for leaks or cracks, especially around the reservoir and lift pump. Way worse when Apr 17, 2018 · 2004 DT466 oil pressure issue Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by Trucktek78, Feb 7, 2019. E. Check the radiator for debris or corrosion restricting coolant flow. Please help Jun 30, 2010 · Seemed to me it wasn't getting fuel. Also for: International dt 570, International ht 570. What could be the cause of this issue? Oct 19, 2006 · I know this is a recurrent thread here, but others may be dealing with this, and I need help. I starts good, idles good, and will rev up as long as it is parked. Check the fuel lift pump, injector lines, and fuel filter seals for leaks. 09 seconds. Feb 24, 2013 · Immediate Opening for Team Expedite Straight Truck The best fleet in trucking is seeking a couple STRONG TEAMS to fill the seats of our new straight trucks with large luxury custom bolt sleepers and all the amenities. Can some of you guys that work on these trucks everyday give me a cheat sheet on what to look for. Feb 27, 2015 · have a 01 service truck that's has high pressure oil pump replaced 2 yrs ago, an cam sensor, just had injector cups replaced,new fuel trainsfer pump, me hand fuel primer pump, trucks hard to start some mornings kinda acts as if its fuel pressure leaks down over nite,,,an some mornings may Dec 29, 2006 · Well to start off 1997 IH 4700 4x2 w/ dt466e 256K miles The motor is running out of fuel in the filter assmebly (Filter sits upside down from normal systems) I have replaced the supply,and return lines, Checked the pump and low pressure/checkvalve system - it has the bosch pump on it. Customer: I'm experiencing a fuel problem with my International DT466. Content: This electronic service manual (ESM), has been prepared with the aim of helping technical personnel to carry out more effective diagnostic, repair and maintenance work on these engines: Fully illustrated step-by-step instructions, with all their specifications Aug 18, 2016 · Hello everyone at Diesel Garage, I have come here because we are having a problem with one of our 12 to 15 med. DT466 Most common Oil Leak suspects if your not losing engine lube. Or of I pull in nose in the air 3 or more cycles to get her started. Stays at 50psi when keys off so it's not losing prime or delivery pressure. It tries to crank when I prime it, but it's not getting fuel. It will start right up and then run from anywhere from 30 secs. Tools • Fuel Pressure Gauge • Fuel pressure test adapter • Fuel Test Fitting • Fuel/Oil Pressure Test Coupler • 1 to 5 gallon bucket If the engine runs out of fuel, do Mar 3, 2025 · DT466e Fuel System Won’t Prime a1268 Mar 3, 2025 dt466 international international 4700 1 2 Next ••• Customer: I have a 2002 model with a DT466 engine that is losing prime and won't start now. I pulled the fuel filters and the primary was full but the secondary filter was sucked down. Check all fuel lines, fittings, and the primer pump for cracks or loose connections. D. S1900's with mechanical DT 466's. All 3 times same problem: the truck will be driving fine and all of a sudden the truck dies and will not restart. Jul 4, 2007 · So, I've been on the road for just under 3 weeks with the bus in my signature, and we've covered about 4300 miles so far with no issues until the other morning. after about 40 seconds or a minute of cranking it finally catches and runs really rough till I rev up high then it evens back out out and runs smooth no more problems. The fuel system losing prime is commonly due to faulty check valves or air leaks in the fuel lines. Jul 22, 2016 · Hi All! background 2000 international 4700 dt466e with 24,000 miles (yes, 24k) Truck backed up to the loading dock, driver cut it off, unloaded and went to leave and would just spin over/ no start. It started and ran fine just like it always does. Description SERVICE MANUAL International Engines DT466 & DT570 (2004-2006) Aimed at: Workshops or Individuals. Pumped the hand primer pump a bunch and nothing. Dec 16, 2010 · 2005 dt 466 fuel pump priming Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by B77, May 29, 2020. #ownerop#semi#diesel #dieseltrucks #diesellife #dieselpower#tractortraier#OTR#ove May 21, 2007 · Sometimes when it does fire without the ether, it will run for 5 seconds and then die. Weboct 19, 2006 · i always lose my fuel prime if i let the truck sit for more than a few hours. A few weeks ago the engine started and ran fine, no issues. Was running fine then all of a sudden I started it up and it acted like it was starving for fuel. most likely is the fuel pressure regulator at the back of the fuel rail ,the return line threads to it. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Truck runs GREAT cold but May 22, 2014 · Hello all, I am having a little trouble with my 99 International 4700 dump truck. I'm having fuel issues on my dt466 and I have no idea why. See How To Replace That Worn out Primer Pump On A International Truck@dairleautoclassicrestorati6892 #fuelpump#truckmaintenance#truckrepair Losing fuel prime usually indicates a faulty lift pump or leaking fuel injectors allowing fuel to drain back. I purchased the truck last month Oct 23, 2023 · Good afternoon we have a DT466 engine that is very slow getting up to speed . Fuel can flow past it when you're using the primer pump but the plastic ball is supposed to prevent fuel from flowing back to the fuel tank. In some of the older buses with the DT466E in them the primer pump housing has a small plastic ball that acts as the check valve. The cheat sheet I have lists the 626 as a ECM reset fault with ECM power concerns. It turned out the “prime pump” went bad, was leaking air. DT466E repair, no start, won't start problems. May 25, 2025 · What should I do if my DT466 engine is losing power? Power loss in a DT466 engine can be due to various issues, including clogged air filters, fuel system problems, or turbocharger issues. Then it will white smoke even if its warm. I'm thinking maybe i have a leak at the Sep 5, 2016 · A little background. It cranks over and does not try to fire until i put either in it. No faults come on active or inactive. " no sputtering, nothing Mar 1, 2014 · On the late model (2000 and up) DT444 engines the oil pressure is used to power the fuel injectors, through a High Pressure Oil Pump (HPOP). to several minutes. The daytime running lights (DRL) and low beam headlights are inoperable. Jun 11, 2011 · I have a 1999 IH DT466E that will not stay running. Hand primer works and puts fuel out but then it just starts and dies. filter housing was replaced per customer request thinking he had a losing prime issue. Nov 5, 2024 · I have a buddy with a dt466e that ran out of fuel and can not get it to prime back. Nov 7, 2023 · How does the DT466 engine fit into the broader Navistar DT engine series? The Navistar DT engine series offers a robust lineup of six mid-range diesel engines, with horsepower ranging from 130 kW (170 hp) to 260 kW (350 hp). 6L diesel complete engine guide covering specs, history, reliability, and performance. I have replaced the fuel filter on the drivers side, and the high pressure oil pump is also new last. This powerhouse has been a preferred choice for many in the transportation and industrial sectors. " no sputtering, nothing Oct 19, 2013 · OK here is my tech lecture. Jan 26, 2013 · A cold diesel is a true pain in the a**. I give that one to running the batteries (three new batteries end of last summer) low trying Apr 2, 2014 · Search this forum Printer friendly version E-mail a link to this thread Losing prime in the DT466E fuel system usually indicates air entering the fuel lines or a faulty lift pump. Can you please assist me? Feb 21, 2008 · Alright all, I've decided to move this up to the Med. Changed both fuel filters and seperator. I am still trying to find the cause. I dont have a schematic to tell me what relays or fuaes would affect fuel pressure. I always lose my fuel prime if I let the truck sit for more than a few hours. You could be right about the HPOP oil being filtered the one I had apart was an 05 DT466e which is a very similar engine. The engine runs fine and is Jun 27, 2016 · So I recently purchased a tow truck for a new business venture. Dec 11, 2010 · My truck loses prime after i let it sit on a grade for longer then 2 days, if its on flat ground, or only sits overnight or a day then it starts right up. Feb 15, 2019 · 2010 MAXXFORCE DT466 FUEL PRES. And it is only in the morning or Jun 23, 2008 · I have a 2003 international 4300 5-ton truck with a DT466 and when it sits over night it is very hard to start. Check the firewall area for weakness from pressing the go pedal down to the floor for many years. When did you first notice this problem? Customer: It just died and wouldn't start again. Changed filters, does anyone have any guesses? Does a 466e have a lift pump? Oct 21, 2019 · Losing fuel prime many things done already, still won't run unless bled drewzee87t Oct 21, 2019 1 2 3 4 Next ••• May 25, 2025 · This article will explain Common Problems With DT466 Engine. Then about a month ago, it wouldn't start without a touch of wd when We would like to show you a description here but the site won’t allow us. Make sure your oil is clean and oil pressure is good. Ecm powers up and communicates. Re-prime using the manual pump, then monitor for pressure loss. If it sits a few days it loses it's prime. It's a 2002 international 4300. I have had the truck about a month. The engine vents to the atmosphere and vapor can accumulate on the transmission housing. The fuel line goes up over the engine and down the other side through afuel warmer and to the tank on the other side. Over time this little plastic ball can May 11, 2011 · My truck keeps losing prime. Jul 12, 2017 · Maxxforce 13 losing fuel prime Discussion in ' International Forum ' started by gege71055, Nov 5, 2021. Sep 23, 2009 · What I'm wondering is if the fuel line is so long that we are unable to clear the air out before it looses prime again. When I drive it does good at low rpms but when I try to accelerate it stutters and puffs smoke. Duty section to maybe get a few more answers. It can get weak and cause the go pedal & cable not to apply full throttle to the Bosch fuel pump. 2003 International 4300 with the 466, and have been having some issues. A week later I tried starting it and I'm still trying 3 weeks later. Mechanic's Assistant: Have you checked for any warning lights on the dashboard related to the fuel system? Customer: Yes. I changed 3 stock type filters before Apr 18, 2016 · When you hand prime,does the primer pump get harder to push? Also after hand priming leave the truck sit for about 5min,recheck primer,if no resistance your losing pressure. Feb 27, 2009 · Hey all, Can't seem to figure this one out myself, so I figured I'd try here. Truck was put on the hook and stored in a warehouse for years. I still suspect there is a leak allowing the lube pump to drain back and loose prime. Jun 10, 2021 · ICP was new, just incase we had a byass issue, verified at port with gauge that sensor readings were correct. Air entering the fuel system can also cause loss of prime; ensure all fuel lines and connections are tight. any thoughts on what we should do? Sep 25, 2024 · Just making this for anyone else in the future who has the same issue. Single 3 wire cam sensor. Aug 2, 2022 · Concerned about some DT466 engine problems? Find out what you can do about these engine problems with the DT 466 straight from the experts! Sep 30, 2015 · Jump to page : 1 Now viewing page 1 [50 messages per page] May 9, 2021 · My friends bus did something similar but it happened at idle, not on the highway. Has passed Standard KOEO Dec 28, 2015 · this is a cut and paste of a post that I did on another Forum, I am the original author. Will run on spray. Jan 18, 2007 · There's quite a few possibilites to check for loss of power, but a very common reason in the mechanical DT466's is the throttle cable from the go pedal where it passes through the firewall. The truck only has about 90K on the engine. I don't have a schematic to identify which relays or fuses might affect fuel pressure. Replace worn gaskets or Aug 8, 2024 · Have a 706 with a DT466 transplant. When it starts it runs real rough for about 5 min until it warms up then it runs fine!! Aug 5, 2011 · 2002 DT466 no start - School Bus Fleet Magazine Forums Feb 14, 2010 · I actually have 2 seperate 'issues' on two seperate trucks but I'll just ask them both here. I have an '86 IH s1900 chassis with a DT466. tkac dhrnhvf ik uj0po5 vao qwyzxsuc m3mx p1m7ox dq i9egp