Mackpro

As Onxy said the ABS and ATC system can cause dead throttle pedal issues. I thought it was only on the M-drive trans trucks but also happens on outer manual trans trucks . It was throw a Speedo sensor code as well.

The connecting rods are “ Fractured Fit” on MP engines. They freeze and break them when they are whole. So they have a rough look where the lower and upper meet.

I believe there was a service bulletin on replacing the complete tandem pump assembly when there was leakage at the tandem pump weep hole. I replaced one on an older MP with 800,000+ miles on it . Where the fuel pump bolted to the powers steering pump was chewed up inside where they connected. It was one of the few times where I pulled the injectors on a hard starting complaint and it wasn’t a cups issue.

The 04 emission MP7 in the CTP/CXP has copper injector cups and there is no upgrade to the stainless cups and updated injectors for this engine. However there are upgrades to the injector hold down yoke and bolts. There service bulletins out there for the parts and procedures

When I would go the the Mack schools in Atlanta and Chicago they had the big posters on the walls of the quad turbo engine.

Using the stalk switch on the right side of the steering column. Go through the display screen till you see “Trip Info “. Enter into the Trip Info and you will see Trip1 and Trip2 and engine hours. Go into Engine Hours . If all you see is dashes then the Engine ECM is not powering up . Possibly bad engine ecm or low voltage/bad ground to the engine ecm .

The braded line that run from the expansion tank to the top of the top radiator pipe has been know you collapse inside . Take the line loose at the radiator hose and see if you can add more coolant. Sometimes the elbow fitting on the expansion tank is actually a check valve with a ball in it. This can get stuck and cause issues. There were many variations of expansion tanks and piping and fittings over the years and service bulletins for upgrades that could be done .

Usually we get over temp on the T2 temp sensor and the regen kicks out when the injector cups are leaking . However , going over some old notes , yes , the cups can cause all sorts of regen issues.

Drive it around the lot. Sometimes the ABS Ecm needs to see wheel speed to clear the code.

Is this on a newer truck with the power divider and inter wheel lock too?

I always found it weird that they hid the brake light switch on the outside on the RD’s with an ETECH engine. I can’t remember If the earlier RD’s were like that as well.

Being it’s a GR , all the lights go through the LCM . Light control module. In the fuse box on top of the dash check all the fuses marked LCM1 -2-3-4-5 . There possibility as many as 6. Also there is a fuse F49 that is related to the back up lights .

Look for a switch on the dash or on the overhead console that shows a fan blade and says sleeper or bunk. This shuts off the sleeper heat/ac

The S22 code is the Mack 3-2 code rpm sensor on the flywheel open circuit. The S231 is the J1939 data link between the Ecm’s. These are always green and yellow wires twisted together.

https://macktrucks.vg-emedia.com Type in SB221034 , this is all the terminal part numbers for the pins for the connectors on the ETECH and ASET engines. The connector bodies themselves are harder to look up. The dealership can call parts specs and they will send them the blueprints of the harness with the part numbers of the connector bodies. Just had to do this on Monday on a ASET.

The upper black rubber bumper part number is 12AX141

https://static.nhtsa.gov/odi/tsbs/2013/SB-10054150-5440.pdf

There is a metal “L” bracket that is on the steering column bracket. This “L” bracket serves as a upper stop to keep the clutch pedal from coming up to high. There also a rubber bumper on this “L” bracket. The rubber bumper usually falls off and the “L” slowly get bent up allowing the clutch pedal to go higher. This is Partially due to incorrect clutch adjustment and /or the clutch cable length adjustment or stretch. I’ve seen people bend the “L “ bracket up to get clutch free travel when their clutch wouldn’t adjust anymore. If you have the big “grated” clutch pedal,, it was a option. You can get the standard pedal still I believe. It was easy to change,

https://www.mid-americaclutch.com/literature/mack-truck-sb313005-air-operated-clutch-assist-adjustment-troubleshooting/

Great point , most all of the individual connector ends are still available for the ASET engines. Just last night I replaced the harness end on a 2005 CHN ASET turbo actuator . Anymore the harness can be repaired unless damaged by fire which was common on the ASET AC engine

I can look into the code in the morning. All my books and notes are at work .

There is one showing at one of the Mack part distribution centers PDC . Usually when the show only one available it’s for saved for dealerships who have truck in the shop with an open work order on it. The dealership has to fill out a VOR form to get the part. It keeps the dealerships from buying up all the hard to get stuff and marking it up 100% because there’s few available. A lot of the time the PDC only shows 1 but actually has many

Good news , bad news and good news again . Good news is yours is a CCRS engine so cam keyway is not a issue. Bad news , going to 460 is a royal pain. Turbo and injectors have to be replaced and have to add in a boost sensor and wire it to ECM if not equipped. Even worse news is the CCRS 460 is you have to use the problematic wastegate turbo that can derate at any given moment if the boost pressure is not perfect. However here is the good news. The CCRS 350,400 and 427 use the same injectors. Best bet is to jump up to the 427 , you will still need a bigger turbo but it won’t be a waste gated one plus you don’t have to change injectors. We detuned a lot of CCRS 460’s down to 427 just because of the turbo problems .

If it’s to the point of vibration and shake under a load pulling a hill we automatically pull all 6 injectors and cups , it comes in a kit

Also , at least your truck is a 2014 , injectors are available your yours . One of our 2008-2009 MP8 has be waiting for injectors since first week of August . They are finally supposed to ship out today but still have no tracking number. I believe there are 5 different MP8 injectors not counting common rail engines.