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At least they tried to use sum genuine parts the white unit had Mack diffs in it!

Be sure you check that your clutch brake is working! If not you would be well advised to remove the clutch cover and check for clutch brake pieces Or you may end up doing this job twice or even three times! Clutch brakes have been known to break and take out speed sensors! Just sayin!

Appears to be an Rd or RB

Maxidyne 285 ESI ?

So You need to find out why its on now See if there are any related engine codes causing a de rate ! also I don't know what kind of work u do However looking a the pic just an observation the turbo appears to have been getting a bit warm indicating a boost leak a split in the after cooler or gaskets as Pro Mentioned! U may have repaired this issue with the things you have already done! You need to see what codes it has logged that MAY reveal more !I agree with Pro It could indeed be a wire issue!

IT is original The first 2 years of E9 Was the same almost primer color salmon brown at one point they did robins egg blue as well! just a little before the 4 valve head was introduced!

Go to the right side of the engine if the turbo has little tin slave cylinder bolted to the bottom it is a waste gated turbo!

Won't likely change your issue ! Having said that I have had good idling engines come in for a cam change due to lifter failure and leave the shop with (a lope )At Idle I was never able to cure this issue so if there are suggestions on this I'm All Ears as well! I'm All Ears as well

Way To make noise Buddy Hopefully this goes some where!

Yes cal code

I vote Scania need a V8 on our roads 😎

Yup You Are correct ! how ever If you are not privy to all the info you can be led on a wild goose chase like this one! And WE would not have Thought of this scenario if it weren't happening till it was brought to my attention by Macktech689! and being able to experiment with it first hand ! customer has not had issues with using 15/40 up to this point 10/30 now the accepted norm for oil so we all have to adjust to this! Like everything we now have experience! This should be added to a (Rough running when cold ) A topic in Case base reasoning ! 😉 Right at the VERY TOP ! First Question !!! Is your engine equipped with the proper Viscosity oil !🤔 Now that we are aware of the issue He can use this oil during the warmer weather and change over in winter if he needs to ,not a problem ! Comes down to experiences!

Sorry only have examples of a gray engine doing this how ever if this is the first run RE check the valve set Bud to loose of a set on one exhaust will cause this on a gray engine this is a sign of lifter failure on a gray engine ! Check that all the valve yokes are in place yada yada GET IT CHECKED! Mp engines have been known to drop a piece out of the valve face as well !

Makes me wonder if they are looking in the right place ODVIOUSLY NOT! have they done ANYTHING with the dpf or scr box??? restriction is what I'm thinking!?? Anyway should be out of warranty soon then it will be your problem!😡Make Some NOISE BRO!

Did you replaced the rocker shaft bolts? I Would!!!

Sorry bro !! I would like to rephrase that comment for ya Tech they charge what the part is truly worth ! Their not tryng to sell you a new truck by making it not worth while to fix !! They are just selling parts to fix A worth while truck!! Just sayin!

So as we disgust! after our little cold snap here this problem has disappeared! Did some research and yes 15/40 is being used to service this engine! So were going to assume that this was the cause ! The engine started up clean once the weather warmed up .Were going to assume once the oil pressure comes up the engine brake becomes partly en gauged till the warmer oil from the base flows through the system ! ??? Maybe?🤔 The customer is a little put off now Because his older units all use 15/40 which he buys in bulk and this unit will require 10/30 ! 5 gallon pails I suppose! 😉 Thanx for the ideas !

Yup Update Needed!!!! 😉

I Feel your pain Bro! We've been putting up with this stuff they been building for quite some time most of us here if not all of us see it ! However don't think for one minute the grass is a whole bunch greener over on the KW line IHC Line THE Pete line ! They are ALL getting cheaper and cheaper ! They are All tring to OUT Cheap each other ! Its ALL junk Out there The pride of a Job Well done is mostly gone due to the attitude of these big company's on this continent It's stock market driven THEIR BOTTOM LINE ! Sadly this attitude creates poor work ethic and so on! Go to work get paid go home ! That's It! To add to it (Its compounding ) because the other little piece of it is society as a whole the attitude in general Sucks already!

Ahh now I get where your going with this !🤔 Well if this is the case this issue will probably disappear until the next cold snap we now have a little warmer weather we will see next week if it smartens up The comment about the oil May be part of the issue as well not sure what oil is being used here, using a lower viscosity oil May affect this situation! What I don't Get is the situation is only momentary at start up lasts as long as it would take to pass an air bubble thru a system after service! 10 - 30 seconds or so! One would think it would take longer run time than that, to change the viscosity of the oil to make that valve reduce the pressure! Your comment also begs the question When was the oil last changed? Another unasked / unanswered question! 🙄 Thanx for the input

Thanks for your response! A question to your response what is the higher oil pressure doing to cause lack of compression on start up only for 10 to fifteen seconds then clears up? as explained the miss sounds like air in the fuel if this were a normal fuel system! Your expectation could be correct as the engine starts Clean then the miss appears for a brief period after running for a few seconds possibly long enough for the pressure to effect the running not sure didn’t link the two at the time .and the sound is not like the engine brake coming on!

Pro We have put the ball back in the park of E service dudes ! We followed what few steps that were available thru PTT and just for giggles we flashed everything again today see how it starts in the morning! We are going to take an oil sample and see if we got any dilution had no sample kits or that would have got done today ! The truck is 2018 gu so we got to follow the rules Of engagement as you know!This unit has had no issues up till the snow started flying and the 6-7 below freezing temps so my be it just don't like the cold, who does? a shrinking o ring or something not even sure its an air bubble just sounds like it! The new filter head has more check valves in it than Carter has pills. In typical fashion they have created a more expensive filter head that encompasses the HI Function in it so if something fails inside it you got to replace a 2000 dollar part instead of a 500 dollar part! Can't test Jack sh*t ! Can't isolate things properly to get a handle on what is happening!

Rob These are definite questions to be worked thru ! Because its so long between getting parts and trying stuff its hard to Gauge ! Seems to be an overnite or parked a day or so anomaly at this point! I have suggested getting an oil sample done at this point we will see if that suggestion get any action from the gurus! The sound is reminiscent of An air pocket on a normal fuel system! Seems to clear after a minute or so of running If We find a fix I will post it! .Macpro Said above there is a rail reg and preasure sensor !We changed out the reg and the harness to it as the plug looked to be getting warm! He went to school on this system I how ever are on the outside looking in! 😥

So I'm fishing for info here we have the afore mentioned truck sits over night ,it starts clean then ten seconds or so into the run it starts missing and stumbling like its passing an air bubble past the injectors then cleans up and runs Ok No CODES ! Now the guy is quite fussy and is not happy with this anomaly that has started here with in the last couple of days Is been cold here 5 or so below freezing not sure if this has anything to do with it however! not sure where the check valves would be on the system or if its loose its prime on the high side or the low side of the system , the fix we thought might repair this the rail sensor and harness did not correct this condition ! Having Zero experience with this fuel system its going to be hard to nail this down ! Searching for clues to this issue if anyone has ANY experiences feel free to pipe up! Should we be Taking an oil sample to see if there maybe fuel in the oil ? using the pretense that where there is Air there is likely a fuel leak??? No visible leaks on the outside!!! Reasonable Opinions? Setting fire to it Is not an option At this point! 😁

Your only choice is to lift an injector to see what cups are in there in my opinion! Assuming it is cup issue