Mack mp8 problems. There have only been very minor attempts at improvements.

Mack mp8 problems 2016 Mack Granite GU713 with the MP8. The regen light is flashing on the dash but there are no DTC’s regarding DPF differential pressure. There is no cure for the problem. Now. Feb 23, 2024 · 2018 Mack GU813 MP8 The fan belt blew up a few weeks ago and took out the fan clutch harness. Live in Florida and when it gets Mechanic's Assistant chat Customer: I have a 2016 vehicle with an issue where it runs fine in the morning when the outside temperature is lower. Nov 18, 2016 · Here are both the service bulletins. Is The Truck Finally Fixed? #owneroperator #macktrucks #turbo Nov 8, 2017 · Jump to page : 1 Now viewing page 1 [50 messages per page] I am having problems with a 2008 Mack MP8 engine Eaton Fuller Ultrashift automatic transmission, I replaced the clutch, Apr 2, 2011 · unfortunately i think i am going to have to take my truck in. It will n When a 2009 Mack MP8 won’t boost over 18 psi despite good air-to-air cooler and correct fuel pressure (75 psi), check the turbo actuator and deck calibration. I'm experiencing issues with the EGR valve; it's new, yet similar to the previous one, it opens and closes erratically between 10% and 75% engine load. Note: If the DEF line will remain open for an extended period of time, seal the opening to prevent Aug 27, 2016 · Have a 2016 Mack Granite 1400 miles, with a regen problem. Agree with steeler, junk!!! Never again. pdf May 17, 2019 · The AHI module goes through various self-checks during the operation of the engine. Cover the DEF line with a plastic bag and secure the bag with a tie wrap to prevent spillage on nearby components. Known for its reliability in heavy-duty applications, the MP8 remains a popular choice for fleets running Pinnacle, Granite, and other Class 8 trucks. Starter is good when I jump starting from the start it cranks but not starting. The MACK MP8 is a 13 liter (800 CID) engine with electronic unit injectors, a cooled Exhaust Gas Recirculation (EGR) system, a Diesel Particulate Filter (DPF) system and the Holset Variable Geometry Turbocharger (VGT). 5V reading dropping to zero suggests a poor ground or ECM output issue. MP8 505hp. Mar 19, 2014 · The engine has positive crankcase pressure which causes the problem. The routine is also captured in a . Had warning 5 minutes until derate and speed limited to 5 MPH. Yup, sounds like the classic cup problem. At DPF Delete Shop, we specialize in DEF, EGR, and DPF delete Mack MP7, MP8, MP10 engines. Effective Sep 30, 2022 · Ok here’s the issue I have a 2014 with the mp8 having problems starting up truck in the mornings . Jul 9, 2025 · The Mack MP8 engine for model years 2014–2016 continued to evolve with improved fuel efficiency, better emissions performance, and advanced diagnostics. Anyway If no boost leaks are detected, Cause Purpose: To have a series of routines in Premium Tech Tool (PTT) to effectively evaluate and diagnose the NOx sensors, Urea (DEF) dosing system, and SCR efficiency. Also I do have bubbles Apr 20, 2024 · 2016 Mack GU713 truck with Mack MP8 engine. Total Regens Apr 3, 2025 · Ownership, maintenance and mechanical issues forum for all Mack truck models, including Pinnacle, Vision, Titan, Granite, CH, CX, CV Jul 14, 2009 · I have installed an update kit from mack on a couple 350 macks, it was an external oil pressure line from the oil filter housing to the jake stands, seems some of the engines dont get enough pressure and volume to the engine brakes after they are good and hot. For best diagnostic results use Volvo/Mack Premium Tech Tool (PTT) software with NEXIQ2 adapter. This is a manufacturer of not only tractors, but also one of Jun 14, 2021 · Español (Spanish) Mack MP8 EGR delete and Mack MP7 EGR delete via ECU remapping from Effective Tuning – one of our professional tuning services that we are proud with! At, Effective Tuning, we offer various chip tuning solutions and the best ECU tuning files online for Mack trucks, including Mack DPF delete (Mack MP8 DPF delete), Mack AdBlue delete, Mack DEF delete, and Mack EGR delete Mar 12, 2014 · Ok guys, I've posted this elsewhere with no luck so far. Mack Truck MP8 Engine: Common Issues and Troubleshooting Tips MP8 engines often face turbocharger lag and coolant temperature fluctuations during heavy use. I looked for trouble codes on the instrument display and found inactive codes for high engine oil temperature and low oil pressure. Apr 20, 2019 · Really hoping someone can help me solve this problem because I've lost faith in my Mack dealer and we have dumped A LOT of money into this truck already! I'll try to give as much information as possible but if I miss something feel free to ask. Computer diag showed mechanical failure in the turbo, and one had cly 5 misfire, and the other was cly 6. Check the starter solenoid wiring harness, focusing on the EB29 ground wire for proper continuity. It will not do a passive regen which results in the filter getting clogged every 4 days. When you turn the key you can hear the relays clicking away. Changed fuel filter still same thing. I googled it and most say Macks have issues with poor injector cups (whatever they do). would come out of FSB 237-021, Valve, Common Rail, Remove (May 2021) Some MACK vehicles built with MP7 or MP8 engines between 11/14/2016 and 05/04/2020 may experience internal leakage or an electrical fault of the Electronic Pressure Relief Valve (ePRV). Sometimes the oil cooler thermostat shorts out and also sets a code for the piston cooling thermostat because the share some of the same wiring, I know the newer common rail trucks we have , have a separate fuse just for both of the thermostats. Feb 1, 2019 · If so, the problem is the cap---leaking o-ring sucking air into system. they said that it needed a regen although it did not request Oct 26, 2017 · I have a 2009 CHU613 heavy haul truck with the mp8 485hp engine. You can get a replacement cap from Mack. Same codes keep reoccurring. Asked Mack if I could just get the harness and they said no. The system is made up of 3 primary components: The AHI Module, Fuel and Air Lines, and the AHI Nozzle Oct 26, 2017 · I have a 2009 CHU613 heavy haul truck with the mp8 485hp engine. Especially on 2011 models to current with MP8 /D13. The Mack Truck legend of the car market is the world-famous model of the AC truck, named "Bulldog" for its characteristic design and unique performance characteristics. Mack MP8 Engine Injector Cup Leaks and Wear Issues Injector cups wear prematurely and develop leaks due to poor sealing and machining defects. Have replaced ac switch and confirmed correct operation of ac except the fan doesnt cycle as it should. Jun 10, 2018 · 2019 Mack MP8 Injectors-fuel system By Munnon June 10, 2018 in Engine and Transmission With This Original Factory Service Repair Manual The Technician can Find and Solve any problems encountered in the operation of your Mack Diesel Engine Models of : MACK® MP8 DIESEL ENGINE SERVICE MANUAL (EURO 4) This is true Electronic pdf copy with contains high quality images and diagrams, not scanned version Contents of this pdf service Manual Aug 24, 2013 · I have a 2008 Granite with a MP8, I had 2 injector's go bad so I had the local Mack shop replace all 6, they told me the engine wiring harness was bad, so they replaced it at the same time. I had my Mack Mp8 Turbo Replaced On The Road, How Much Did It Cost. Al Dec 2, 2020 · Got a 09 Mack mp8 485 hp. One said “low DEF quality detected, derate soon” and the other said “parked regen needed”. The fault code will sometimes lead you to believe that the problem is with the 7th injector; however, in reality, there is an issue with the AHI module. Mack Model LR , TE - TerraPro , AN - Anthem , GR - Granite , PI - Pinnacle May 19, 2023 · Hey guys I've got a 2020 Mack Granite with a MP8 455M and Allison Transmission, it started out pushing coolant out the overflow tube and the coolant was bubbling in the tank, took it to dealer they said egr cooler was bad so they changed it got it back and it had low power, higher than normal coo Jan 20, 2016 · Got a MP8 exhaust roller and camshaft on #1 cylinder, camshaft will have to be replaced, should you replace all 24 roller rocker arms or just the one, mack parts said rollers not replacable. Mack MP8 Engine No Power and RPM Fluctuation Issue MP8 engines often face fuel pressure inconsistencies and erratic RPM under varying load conditions. We put a crank switch on the solenoid and the starter does turn over. Check the wiring harness for corrosion or loose connections, especially at the starter solenoid terminals. Inspect the cup’s internal surface for machining defects. 2015 Mack chu613 Pinnacle MP8 mDrive Bought at 212 thousand miles (March 2020) Now at 279 thousand miles (Today, Nov 2020) The transmission problem is that it started to not have any power or engagement in the even numbered gears (2,4,6,8,10,12) rpms to 1000 but no power . I will look for the service bulletin later and let you know . The engine sounded like it was ready to explode from exhaust pressure. There is a fuel regulator fitting in the head, the mp7 one is on top of the head, front drivers side. Additionally, if you have decent re-usable external components that are still in good order, then these can be salvaged from your previous MP8 engine. Fan is staying engaged all the time. I recently bought a 2014 Pinnacle day cab with the MP8 and Mdrive. This Mack MP8 showed low power under load — here’s how we diagnosed the real cause: 🔧 What we tested: ️ Boost system — found small air leaks ️ Fuel system — ran an air-in-fuel test Nov 4, 2023 · New fuel filter didn't help. Here are some common causes of surging under boost in a diesel engine like the Mack MP8: Boost Leak: A leak in the boost system can lead to surging. 00 no telling what this will cost. MP7 MP8 MP10, we do online ECM delete tuning for all Mack engines! Mack OBD2 delete! Power upgrade according engine factory spec! Solve all aftertreatment issues on Your Mack truck! Hello, I am an equipment mechanic, and I'm here to assist you with your questions tonight. pdf Jan 21, 2018 · ENGINE WILL NOT TURN OVER WITH THE KEY SWITCH NO POWER AT THE STARTER. I have Mack PTT, the licensed version through Mack. I am also looking at Peterbilt,KW,And Freightli System Overview The Aftertreatment Hydrocarbon Injector (AHI) System is a component of the Emissions Aftertreatment System (EATS) that monitors and controls fuel injection into the Diesel Oxidation Catalyst (DOC) to regenerate the Diesel Particulate Filter (DPF). They sometimes quit working properly. Dec 3, 2017 · Can any one tell me what's the problem with my truck mack granite gu713 2008 mp8 engine not doing a complete regen , it was at dealer I change a lot things docer7injector egr valve fuel lines dpf filter the light at bottom was blinking and not doing a complete regen they fix it I run the truck fo Introduction to Mack Engines Mack engines, including the MP7 and MP8 models, are renowned for their power and reliability in the trucking industry. engine fan staying on, do you have diagnosing steps and wiring diagram. Most MV techs and service managers know the problem exists but no one including Aug 17, 2016 · Any input on the fan clutch conversions for the MP7 and MP8's It's a good thing to get rid of the big oil filled clunker, however we are having trouble with getting the ecm's reflashed to get them to cycle properly. It's looseing fuel overnight. Knowing how to identify and resolve common Mack engine problems is essential to avoiding costly repairs and downtime, whether due to high mileage, poor maintenance, or defective components. I requested that they changed the oil and filter Customer: Hi, I have a Mack MP8 EGR engine that is using coolant. Jul 12, 2025 · Mack MP8 (2021–2025) fault codes list and repair specs. Injector cups in Mack MP8 engines often fail within a year due to chatter marks on the sealing bevel. Brought truck back to the shop and ran SCR regen (crystal sublimation reduction) and Exhaust Aftertreatment System, Service Regen. Truck went into derate with warning that truck would be limited to 5 MPH at next stop (that would be engine shut down and restart). This trucks fan runs in high stage more than any other truck I've ever driven but never in high stage all day Sep 20, 2011 · Mack Truck GU series with MP8 Euro3 Engine The owner complained that the fan was not turning on to full speed. This is an oilfield fleet so its hard to get feedback from the drivers, there's no telling who will be driving any truck at any time. Back in the day, Mack engines like the E7, MP7, MP8, and ASET all relied on Nov 18, 2018 · Loss of oil pressure in engine brake housing examples- split orings on solenoid most likely the bottom oring, missing plugs at the end of rocker shaft (plugs look like little freeze plugs), valve/ engine brake adjustment (in my experience this is more of a red engine problem MP8), Jake Brake needing updated Edited November 18, 2018 by Challenger Jul 28, 2021 · So I have 2 trucks so far at around 250k+ miles started to misfire. Back in 2008 I went to a Mack engine class on the then new MP engines. Is this common? I’ve heard even new Mack’s can’t pull Any suggestions ? Aug 20, 2018 · Hello. 180,000M on the truck. This document includes the list of Diagnostic Trouble Codes (DTC) that, when following Guided Aug 15, 2019 · The egr valve stuck open on my 2014 Mack with an MP8 engine. Jun 9, 2010 · The engine brake solenoids are located under the valve covers. When under full engine load, everything seems fine, but it's the Sep 16, 2018 · I have a 09 cxu613 that will not crank. Anyway If no boost leaks are detected, . After treatment problem started at 475k now has 545k presently in the shop for the same. Did this do any damage to the engine? I’ve never heard an engine sound like this!! Jun 3, 2017 · Have a mack MP8 (?) with the Mack badged renault engine in the shop with a fan that stays on constantly except when I unplug the a/c high pressure switch. Not zero, just two dashes as if there is no reading or boost w 2014 Mack pinnacle mp8 engine rpm’s fluctuate during warm up and then settles. Mack MP7/MP8 - TECHNICAL TIPS The following lists important Technical Tips that will help you locate and repair common problems on Mack MP7/MP8 Engines and DPF/SCR Systems. Jul 2, 2016 · On 7/2/2016 at 8:23 PM, fjh said: It sure sounds like cups or bad injector cumbustion in the fuel gallery. If the system detects an issue, it will automatically cause an active fault code related to the AHI module or 7th injector. After approx 20mph the truck falls flat on its face. Jan 9, 2019 · Hello, 2011 Mack CXU613 MP8-445 600,000 miles(10speed) Motor intermittently stumbles or jerks on hard pull when calling for boost. FOR PINNACLETM, GRANITE®, TERRAPRO®, AND ANTHEMTM MANUFACTURED YEAR 2022 GHG AND NEWER No crank and won’t start Mack MP8. I have a 2008 Mack MP8 engine that the engine fan is staying on all the time. Should rod and main bearings be c Introduction This information provides details for the MP7, MP8, and MP10 engines for MACK vehicles. Mar 12, 2014 · Ok guys, I've posted this elsewhere with no luck so far. Sep 1, 2020 · Iam working on a 2011 mack cxu613 it has a mp8 and mdrive trans everything is fine when you first take off after about 5 mile truck just has no Jan 24, 2018 · My equipment. The truck idles smoothly after warming up, but it runs rougher in the low RPM range. Seems mack has a different engine and my choice is paccar Pete or mack with the mp engine. Mitchel says to Truck is Mack *****************, model ch613. Sep 3, 2021 · Hi all. Aug 17, 2018 · Looking at Mack pinnacles with MP8’s. I currently own 3, 04 cv713 with the 427 and have had very few problems had to do the cam and lifters on one and thats it other than that pretty reliable. The line set coming off the DEF tank going to the pump has Oct 31, 2013 · I have a 2008 granite with a MP8. Apr 13, 2014 · What major problems are there with the new MP8 motors with DEF? Any ideas of what the best HP would be for good pulling power on hills and good fuel mileage? Gonna get the Allison auto and half the year pulling a shorty dump at 73,280 and the other half pulling a tank or a long dump at 80,000. MP7 idler gear pinning. They have an updated oil level/temp sensor and pigtail and oil pressure sensor pigtails that help with the issue as those are both common. And 2012/13 MP8 Mack Engine Starter Solenoid Voltage Issue MP8 engines often face starter solenoid voltage drops and ground wire signal inconsistencies during startup. Dec 4, 2013 · having trob starting A Mack, 2011 mp8 engine, we blocked off all lines to tanks, fuel seperator, and installed 2 new filters, also made sure top and bottom chk valves were working. Properly calibrated actuators and a functional wastegate Push the quick connect fitting coupling in the ON direction, squeeze the holding clip lugs on either side of the connector and pull to disconnect the DEF line from the dosing valve. I check the ignition switch and had 12 volts on all terminals. We checked all the relays and fuses. Maybe someone on here has had this problem and knows a fix. Im doing a bull gear failure in a 2014 MP8 right now. Yesterday while pulling a load I got 2 messages simultaneously on the info screen. Fan is the Mack MP8 Engine No Power and RPM Fluctuation Issue MP8 engines often face fuel pressure inconsistencies and erratic RPM under varying load conditions. My problem is ever since then I have lost 6 to 7 pounds of manifold pressure pulling and 10 pounds when usi Jul 27, 2022 · 186000 miles on a gu813 mp8 and i have had mack come out to help me with this troubled dog we cleaned 7th injector and replaced air valve at def pump regen went ok took for ever to get above 840 to 900 degrees . Jul 15, 2015 · Throws active code mid128 sid27 fmi7. I recently replaced the engine harness filled with oil thinking the was General Information These repair instructions are intended to address the following fault(s): Jul 28, 2015 · I'm new to the forum but extremely knowledgeable about the injectors and cups. Apr 12, 2019 · Engine family Engine family 11L Engine , 13L Engine , MP7 , MP8 ** SOLUTION ** • Fault codes listed below are present on a DTC Readout: Aug 18, 2014 · Jump to page : 1 Now viewing page 1 [50 messages per page] Sep 18, 2023 · So yesterday (Monday) I took the truck out and drove it. Was wanting feedback on problems related to this engine as well as problems with the truck overall. No active codes. This behavior is causing fluctuations in boost pressure. Hard starting with prolonged cranking and visible air bubbles in the passenger side tank usually indicate air entering the fuel system. Properly calibrated actuators and a functional wastegate May 28, 2025 · Understanding Mack Injector & Cup Designs If you've been dealing with mack truck injector problems, understanding how injector cups evolved can save you from making expensive mistakes. We average speeds of over 60 Mph. With the engine off the fan blade turns 2009 mack granite mack mp8. all codes left that were on next day same doggie isnt happy i call mack tech an Have 2016 mack mp8 the issue is it runs fine in the morning when outside temp is lower. DEF pump not able to build pressure. Now, what do you do? We have compiled some guides to help you interpret these codes and understand these codes. I was wanting to know if a turbo charger super charger from a 2013 Mack MP8 engine Jul 5, 2016 · I don't know why but these various boost pressure dtc's and complaints of intermittent pow loss have been coming in lately. The story of Mack's injector designs is really a tale of learning from failures - and it's knowledge that every fleet manager needs. Not sure about the mp8 location, but I doubt that will be your problem. However, like all engines, they can be prone to issues such as EGR leaks, EGR sensor failures, and DPF problems, which often trigger fault codes. Plus lost income I figure maintenance cost about $ 1. Also the oil will push through the injector wiring to the eecu. Tiny bits of metal around #1 where the cam roller ate into the camshaft. Truck is a 2016 CHU613 with an MP8 505HP 18spd. . . truck idles smooth after warm up, but Mechanic's Assistant chat Customer: My 2014 Mack Pinnacle MP8 engine's RPMs fluctuate during warm-up and then stabilize. 2012 mack mp8 runs good for a minute or 2 then starts cutting out until it dies. Total Regens Apr 3, 2025 · Ownership, maintenance and mechanical issues forum for all Mack truck models, including Pinnacle, Vision, Titan, Granite, CH, CX, CV Apr 12, 2019 · Engine family Engine family 11L Engine , 13L Engine , MP7 , MP8 ** SOLUTION ** • Fault codes listed below are present on a DTC Readout: Aug 18, 2014 · Jump to page : 1 Now viewing page 1 [50 messages per page] Sep 18, 2023 · So yesterday (Monday) I took the truck out and drove it. Feb 11, 2012 · MP-8 Engine question Discussion in ' Mack Forum ' started by Smurf, Feb 11, 2012. Thank you in advance Mack Truck MP8 Engine: Common Issues and Troubleshooting Tips MP8 engines often face turbocharger lag and coolant temperature fluctuations during heavy use. We would like to show you a description here but the site won’t allow us. all codes left that were on next day same doggie isnt happy i call mack tech an For power loss in the Mack MP8 445, start by inspecting the fuel system beyond filters—check the fuel pump and injectors for clogs or wear. MACK TRUCK is a factory known all over the world. Wasn't every time but usually worse in the morning. Speak to a specialist today. When this first started a month ago I ran some tests. Can’t pull super b into a wind or over a mole hill . Our service is remote via Team Viewer. These engines are designed to provide optimal performance, efficiency, and durability. If you mash the throttle through the first 3 gears the truck will pull unbelievably well. I remember doing alot of them. Truck has 55,000 miles and about 2200 hrs. Browse our products and solutions for Mack MP7, MP8, and MP10 running rough and misfiring. The engine has been swapped into this truck from a wreck. am having one/multipul problems i can't seem to nail down. started out that the truck would occasionally idle pretty rough esp when hot. The Mack MP8 fuel pump is the critical heart of the fuel system, responsible for delivering precise high-pressure fuel to the engine for combustion. csv file and can be downloaded from Product History Viewer for later review if necessary. Examine the turbocharger for boost leaks or damaged hoses. Once it’s on , drives good and if you turn it off it starts right back up . Claims the Cummins powered trucks won't touch them. I’m currently in the process of switching from hotshot hauling to flatbed and currently looking at Mack Pinnacle trucks with the MP8. I've changed all the fuel filters and the fuel pressure regulator on the front of the motor doesn't seem to be helping at all. In the class there were also techs from some Volvo dealerships. Customer: I'm located in Australia and have a Mack MP8 engine, specifically the earlier model that features EGR. 0L MP8, a 24-valve, I-6 powerplant that has been a stable How the hell do you prime an MP8, after introducing a shit ton of air into the system (and by a shit ton, I basically mean “oops, all air”) Mack MP8 engine oil capacity is an essential aspect to consider in maintenance and performance. Ill check and see if I can locate the kit if it hasnt been thrown away. Also I do have bubbles Dec 3, 2017 · Can any one tell me what's the problem with my truck mack granite gu713 2008 mp8 engine not doing a complete regen , it was at dealer I change a lot things docer7injector egr valve fuel lines dpf filter the light at bottom was blinking and not doing a complete regen they fix it I run the truck fo Introduction to Mack Engines Mack engines, including the MP7 and MP8 models, are renowned for their power and reliability in the trucking industry. $ 25,000. I have a 2010 Mack with a MP8 engine. Swapping and recalibrating the actuator is essential, but also inspect the wastegate for sticking or leaks. The check engine light came on and I took it to Mack. When an unexpected fault code pops up, having the right information at your fingertips I have a Mack giving me some headaches and was hoping someone here had some insight. About every 2-3 wks. The engine conforms to year 2007 Environmental Protection Agency (EPA) requirements. Fan Nov 24, 2014 · The truck was a Mack Pinnacle tractor with its newest engine rating, the 13-litre Mack MP8 505C+. I think Id rather be hit in the head by Mike Tyson than do this. When I try starting it again it just cranks and cranks, if you keep on it will 2012 Mack MP8 Engine Hard Starting and Air Bubbles Issue MP8 engines often face fuel system air leaks and injector pump failures causing hard starts. There have only been very minor attempts at improvements. I have 38 pinnacles. Did this just crop up or have they been acting erratically since new? There is an update kit available through Mack Partswhich corrects some weak brake and other problems associated with your model Jake Brake. Oct 12, 2014 · 2008 cxu613 MP8 485 Regen Problem By Hardball October 12, 2014 in Introduction Forum Mack EGR DEF SCR DPF delete kit. Upon removing the heads we found the heads to Jan 11, 2022 · Are there Mack truck regeneration problems? Here is key information you should know about the Mack truck regeneration problems. Have seen some injectors have intermittent issues. We hooked the truck to jpr May 12, 2017 · 2012 MP8, low fuel pressure, replaced fuel pump, flushed lines , still have 5-6 psi at idle, I have read in forum about regulator in front of head , to which Mack can't locate. Verify the boost control solenoid and related sensors for faults. It's important to check for leaks in the intercooler May 17, 2019 · The AHI module goes through various self-checks during the operation of the engine. The PowerLeash™ engine brake is optional. 10k to reman plus a head so 15k all done at Mack assuming nothing else was bad. This is evident in such modern engines as the 13. Cost so far approx. Also in the morning it takes 10 to 15 seconds to start like it's losing fuel pressure. Original: 2014 Mack CHU Pinnacle w/mp8. The truck will not build more than 20 lb of boost. When a Mack MP8 engine experiences surging under boost, it may indicate several potential issues. Remove the fuel line from the "t" fitting, turn key on and there should be no air coming out "t" fitting. Mar 5, 2014 · MP8 is better so yes 7 has some problems. Apr 2, 2014 · 2015 Mack CXU613 PEN. A 3. Any idea what would cause the fan to stay on continuously? Just started today loaded, empty, sitting still with a/c on or off. Erase code and comes right on again. There are two versions a smaller oil filled one that is electronically controlled For power loss in the Mack MP8 445, start by inspecting the fuel system beyond filters—check the fuel pump and injectors for clogs or wear. Most diesel engines use common rail injection as a way to control many fueling strategies for a better and more efficient burn and to bring down emissions – but it is very complex and still prone to many problems. When the motor stumbles, my boost pressure goes from let's say 33 to flat line. The problem is really not copper or stainless or even installation. I've noticed signs of water in the top end, and when the engine cools down, it is coming out of the overflow. We replaced the fan clutch and everything ran fine till yesterday. For no power and RPM fluctuations in the MP8, check the fuel pressure regulator and injectors for proper operation. Seems to run fine. Feb 8, 2010 · A former member I keep in touch with swears by his Mack trucks. Oct 31, 2024 · I have a 2013 Mac with a mp8. Wa Dec 25, 2016 · Search this forum Printer friendly version E-mail a link to this thread Jul 30, 2015 · Fuel system Unlike most emissionized diesels today, the Mack MP8 engine does not utilize a common rail injection system. I looked at a MP7 in a 2011 that was blown up at 256k cause the valves were adjusted wrong and it ate a valve. SCR fault coming on. odd number gears working fine, but the mDrive still moves to the even gears and thus I get stuck Mp8 engine? Can anyone give opinions on mack trucks and engine repairs please? Looking to lease purchase a rig but only have experience with older cats, Detroit newer Cummins isx and paccar. For starter issues on the 2013 Mack CXU613 with MP8 engine, first inspect the starter relay located near the battery or fuse box. Eventually the truck derated and said “Service D Apr 28, 2019 · Volvo has had the injector cup problem in the D12 and their other engines before the D11,13,16 and MP7,8 and 10 came out. 2008 and up. The instructor kept going over injector cup installations. Fan belt blew up again and took out the fan clutch harness again. 00 a running mile. Can you guys tell me the good and the bad about them? Feb 3, 2022 · Hello guys, I need a little bit of help I have a 2013 Mack pinnacle with mp8 engine, trucks was running fine I had a dpf deleted 3 weeks ago and now the truck start shutdown on my while it’s driving RPM get down to idle and gas pedal will not respond turn the keyswitch off and it don’t kill the e Feb 26, 2012 · I was hoping to get some good opions on macks mp7 and mp8 reliabilty. 2018 Mack MP8 Engine Soot Load and Regeneration Issues MP8 engines often face persistent soot buildup and ineffective regeneration cycles causing frequent regen requests. Today I did something different I primed it from the fuel filter housing and it started right up . I checked temps on all 3 EGT sensors when everything was Jan 30, 2017 · Mack has never wavered from the ideal of building tough and dependable products. We b May 26, 2020 · The check engine light illuminates in your dash of your Mack Truck. Mar 8, 2022 · Replaced lots and lots of the oil thermostats on MP7 and MP8’s. I also have a 06 ct713 with the aset and have had no problems so far. Would this be a issue with wires going into actuator box or the single wire going into center of turbo? To force a manual regen on the 2014 Mack Pinnacle MP8, use the diagnostic tool to initiate the process. For MP8 engine issues, start by checking the turbocharger for signs of lag or boost loss, which may indicate worn turbine blades or clogged air filters. It was put together by Vision Truck Group as a Mack Trucks Canada demonstration unit and then loaned out to James Dick Construction. Jul 2, 2024 · S/N: 1M2AX16C7JM039990 P208064 EGT Sensor Circuit - Range/Performance (Bank 1 Sensor 1) - Signal Not Plausible Truck will complete a regen but once it stops, it still says the soot level is 3 out of 4 and it still requests a regen. Understanding its function, recognizing signs of failure, knowing replacement and maintenance procedures, and selecting the correct quality parts are essential for maintai Dec 4, 2013 · having trob starting A Mack, 2011 mp8 engine, we blocked off all lines to tanks, fuel seperator, and installed 2 new filters, also made sure top and bottom chk valves were working. and occasionally stumble and miss in the low gears taking off easy from a stop when it would miss it would either blow white smoke that smelled of raw fuel or thick black smoke. In the morning when I try starting it, it will fire and idle for what seems like less than a second then dies. Faulty temperature or pressure sensors often prevent automatic regen cycles. But never replaced the piston cooling thermostats that comes in from the bottom. The engine starts and runs absolutely perfect with excellent throttle response. Both start loosing coolant internally. Access free troubleshooting info with Diesel Repair. This trucks fan runs in high stage more than any other truck I've ever driven but never in high stage all day Dec 7, 2015 · Hi guys I have a 2014 Mack CHU613 with misfiring issue and low fuel pressure. The auto concern, founded more than a hundred years ago by the brothers Mack, is a tradition of impeccable quality. If ok make sure 7th injector air purge "t" check valve isn't leaking air back to fuel system. pdf MP8 idler gear pinning. Then returns to normal. bet intph msxxw xvtrx ipf gzkid fiam iqckfv ckkeb mplur kwv twaqmeo zblgwcti axzvt cxmwpnj