CM871 losing power
10-01-2017, (Subject: CM871 losing power ) 
Post: #19
RE: CM871 losing power
(09-09-2017 )Waterloo Wrote:  Sounds like a silent derate, something is not right. Do you have an Inline reader to see what is going on in the ECM? If not, you really need to get one. My off the top of my head guess is that you have the wrong or corrupt CPL file in there. That is where I would start, but you will need that reader, especially if you want someone here to help you.

I am guessing your turbo needs to be recalibrated or relearned to the ecm.
What your describing sounds internally to the turbo.
I dont know much about tuning and ecm related issues,however i do know mechanics that do know a lot and I was told my a solid ecm guy that when you make changes to the ecm that are drastic after having the truck a good while every part in the motor and hanging off the motor has to adapted to the changes .
And once you make a tune or any kind of change, peak or tweek or tune to the ecm (Electronic Control Module) its a done deal, there is no in between, it either excepts the the commands or it does not. Ecm could also be going bad or starting to show early signs of fried.
I know messing with ECM and Turbo areas is never cheap, but I think you are on the right track. Inspect your turbo and actuator from the Rawzes video and eliminate either the turbo going out or ecm going out....
Reprogramming is a bandaid on it i believe...

As you said earlier , truck ran good for a week or 4 days and then started losing boost...
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 Thanks given by: victory26
10-01-2017, (Subject: CM871 losing power ) 
Post: #20
RE: CM871 losing power
Sorry about that, i did not read the entire thread, i see Rawze got you hooked up!
Way to go Rawze!

Im just the new guy !! : )
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 Thanks given by: victory26
10-01-2017, (Subject: CM871 losing power ) 
Post: #21
RE: CM871 losing power
(10-01-2017 )Bedbugger32 Wrote:  Sorry about that, i did not read the entire thread, i see Rawze got you hooked up!
Way to go Rawze!

Im just the new guy !! : )

I always take an objective look ...

The engine was programmed to 570HP, so I told him if he did not think it was producing that 570, then he should have it put on a dyno. I am not a believer in correcting things based on feelings alone. If is not making the power that the ecm thinks it is making, then it needs to be measured. That way things like injectors or other components can be looked at.

I did however find that the engine had an older program in it and a really crappy fuel pressure map from the factory. It had a significant pressure dip in it below 1400 rpm and I have seen this before on some of the older factory files. I smoothed the dip out of the pressure map. I did NOT increase the pressure. Rail pressure only controls fuel penetration, and not so much for power itself.

I told him if it still has issues, to put it on a dyno before continuing. I don't like adjusting anything without solid information, especially power. I have seen that issue before on a few of them, and I suppose it fixed his problems.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: victory26
10-01-2017, (Subject: CM871 losing power ) 
Post: #22
RE: CM871 losing power
I forgot to mention that nothing has been done to the truck since we did adjust the software, except I took to Mr Hag to replace those shafts. It did fix itself somehow, I don't know if that has an explanation.
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 Thanks given by: Rawze
10-01-2017, (Subject: CM871 losing power ) 
Post: #23
RE: CM871 losing power
I'm still in battle with my Volvo with same problem.
First Volvo I had was with 871 now I have 2250 doing same shi#t power lost.
Trucks have different engines and fuel system.
Both trucks are HMR
Both trucks are good in idle
Both trucks are with good boost 32-33 psi
All key sensors where replaced many time.
Now I came to opinion it something wrong with Volvo side due to lot of parameters could change VECU and we can't read them.
Volvo NA is pioneer in stability control system and implement this shi#t years ago.
They call it VEST if you google it. This will derate the engine if ABS sensors reading are out of desired.
In ECM it under C_ABS string and some other shi#t for drive line stability and so.
BTW from 2017 Electronic Stability System mandatory on all class 8 trucks.
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04-23-2020, (Subject: CM871 losing power ) 
Post: #24
RE: CM871 losing power
You know what, I've only posted once on the forum and am not much inclined to post, simply because I feel that all of you are the professionals and are expert in this field and that my reason for belonging to the forum is to learn by reading what all of you have to say, although I do like to offer the occasional "Thanks" in response to posts which I have read and especially like.
However, as a reaction to this particular thread, I do now wish to say something, partly in condemnation of the criminal trash responsible for the events which Victory26 and Rawze worked successfully to find a solution to, but also in absolute support of what this forum is doing to help people when such trouble arises.
First, I will say simply that this report by Victory26 and by Rawze might constitute the most shocking account of repairshop fraud that I have ever heard of, ever, and that is considering all of the many reports of the "stealership" fraud which I have previously read here on the forum, not to mention elsewhere over many years' time.
Here is an honest guy, Victory26, he goes into a Chicago area business, a truck shop. Victory26 does not go in as a thief, he does not go in brandishing a gun while threatening to rob the place. No, instead he walks in honestly while brandishing nothing more than...cash! Hard-earned cash, which he will GIVE to the shop in exchange for a service which they falsely claim to be offering.
And then, they rob HIM!!! Blatantly!
Only on the subsequent inspection of Victory26's now-badly-running truck is it discovered by Rawze, while out in Rawze's driveway with a record hurricane approaching no less, that the Chicago shop had billed Victory26 for the purchase and installation of an entire new ISX head even while the original head...was left in place! In fact to make it look good, the shop removed the old paint to try to make the original head LOOK like a newly installed head!
Would the shop have dismissed any concerns about the noise made by rattling engine brake rockers, a noise which Rawze noticed? Probably, since the shop never even had the rocker cover off the top of the engine, much less the head!!! And their "tune", claimed to be @m*m^2 and no doubt billed at top dollar, was simply a pirated download off of some other truck's ECM, easily traceable in origin because all of that original truck's identification data was now right there in Victory26's ECM!!! If it wasn't all so terrible, I would say LOL, but I don't find it funny.
I find this story to be mind boggling in its crystal clear depiction of the terrible corruption afoot in this industry, not to mention in society at large. It is just shocking to me, terrible.
Those monkeys at that Chicago-area shop (Grayslake, IL, is north of Chicago, up by Waukegan) had no idea that their fraud could be so readily uncovered by someone like Rawze with just a quick review of a computer screen and by a careful look at the serial numbers stamped on the engine's head.
Rawze states that he has also seen evidence of specific instances where the major name-brand OEM truck shops themselves have billed for the sale and install of major components, but where it subsequently came to light that the new assembly, paid for, had never been installed. A brand name and flashy global advertising is no protection for the customer.
Secondly, I wish to send thanks to Rawze, to Waterloo, and to the forum members like snail express and certainly to Victory26 for bringing this specific story, as well as issues like this, out into public discussion. By disclosure of experiences such as what unfolded here, it becomes harder for the criminal trash to operate when their trash crime is out in open daylight. Conversely, it is easier for the good people to gain and make headway if they are getting good information and are able to support each other with that information.
As awful as the bad part of Victory26's experience is to learn about, I also find a lot of reassurance in seeing the degree to which the members of this forum will pitch in to help people like Victory26. Rawze amazes me. He has people visit him all the time and he works right there, out in his driveway, sometimes on Youtube, helping people with trucks, or with careers. He is an amazing person, and all the more so because of the willingness with which he offers his encyclopedic knowledge, his protestations notwithstanding that "I'm just a regular guy working in my driveway".
By sharing knowledge, Rawze and many others on this forum are helping the good people to gain and to make headway. The OEM's flashy advertising is no protection for us at all. In contrast, there is a valid concept being promoted on Rawze's forum which is absolutely sound: the idea being that there is protection to be found in learning how to do as much work for yourself as you possibly can. You can learn how to do that kind of work by reading, watching, and listening to others on this forum, as well as from other sources which Rawze correctly points to - the repair manuals, online or in print. I think it's good to continue with the project of learning even if you don't wish to work directly with wrenches, because the knowledge will still protect you.
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 Thanks given by: tree98 , hookliftpete , kozakvod , Waterloo , victory26
04-23-2020, (Subject: CM871 losing power ) 
Post: #25
RE: CM871 losing power
I think those guys finally admitted to taking his old head to another shop to have "cleaned up" if I am not mistaken. Its been a while since that happened.


=====
problems like these, such as getting taken for components that were not installed, copied programs from other trucks, and all sorts of underhanded things are as high as 40% of the trucks i see and the people I try to help on here these days.

-- This does not include all the bad delete programs I see... I see hundreds and hundreds of them every year. that is a whole other subject in itself.

IT WOULD NOT BE SO BAD -- if only the OEM's and other repair shops actually followed the manuals -- THAT ARE FREE from quickserv... If they did,.. sure, I would likely point out a thing or 2 on occasions, but the real problem is that everyone seems to be in such a damn hurry... Air guns and speed guns instead of torque wrenches .. slap it together as fast and cheaply as possible, get-it-in get-it-out, and onto the next victim to turn that dollar instead of doing something worth $150/hr. <- that is the bulk of the problems and the reason so many bad things come of it.

Even the engine I am working on this week mentioned here: http://rawze.com/forums/showthread.php?t...4#pid53024

This guys exhaust manifold had broken bolt in it,.. and sure enough,.. the damn manifold bolts were anywhere from under torqued,.. to so damn tight that they almost snapped off when trying to remove them.. this is not from age and corrosion,.. it was clearly from some a-hole using a speed gun, or air gun on them during the install,.. that is exactly why it had to be re-done, and i am a firm believer that this is also why it snapped bolts after it got up and running.

Combine that with the rest like mis-aligned rocker shhafts and backed off engine brakes because some turd was too damn lazy to correct his mistakes,.. this is what you get any more.

-- TOP IT OFF... I get repair shops asking me for invite codes almost every week,.. I have no idea what quality their work is,..cuz, if you ask them, they all say the same,.. "We care, We are Great and do it right" --- then 2 months later, you see some of their work, and cringe like freggin' hell at it. --- SO I AM THE BAD GUY because i will give them a code so they can better what they do, perhaps see the real problem wioth doing things in a hurry, but not let them advertise on here, i get a lot of grief from some of them. -- IF THEY WERE AT LEAST 90+% COMPETENT THEY WOULD BE WELCOMED HERE -- but most of them are less that 30%. -- SAD for anyone charging $80, $90, or even sometimes as much as $150,160 / hr. <- no excuse for it.

-- I stopped watching youutube repair videos about trucks all together. - I cannot watch them any more, makes my blood boil over every time I see those wrench-monkeys grab that air gun to tighten things up, no mention of torque specs on critical suspension and other safety components,.. or worse yet,,.. power-washing that DPF can, or bragging about all the pulling power on that truck now because they fooled the ecm into making it think the cylinders are fouled out and it dumping all its fuel in in a crying attempt to keep engine running,.. all while they brag about it like they have done something good. -- I just cannot do it .. I just cannot watch them any more .. In the past, I would make comment on them, suggest they might want to include the torque specs of that tie-rod, or that pitman arm,.. only to get cursed out by the same ignorant clown advertising their shop about doing such horrible jobs!.


-- This is what the internet and social medai has created .. this bleak picture of too much (bad) information, and the droves of brainwashed masses that follow them. <- this is exactly why i got kicked off every other internet site out there... because I refuse to bend to the will of idiots and those no-give-a-s#it ways of thinking!.

-- My background has always been steeped in precision machinery and components. How fast you think the Plant manager in stutgart germany, at the BWM manufacturing plant would have kicked me to the curb if I had showed up to teach/assist a technician how to replace a component on one of their assembly line machines and did not have a certified, calibrated torque wrench in my tool box to tighten the bolts with?. <- Not only would I have gotten kicked out, but fired from my position, reputation tarnished, and all the other bad things that followed suit. -<- now take that further .. how many car sales and reputations would be lost if some customer was watching it and posted it on social medai ... I was "That guy" ... who would do the job by the book, and do it correctly as much as humanly possible, so that I was NOT "that guy" in the hot seat later on over it.

Sorry if I am an a-hole on here sometimes, but I have a serious passion to ensure things are right,.. not mostly right,.. not half-way right .. but right. - i am far from perfect .. never claimed to be ... but at least I give it my best efforts without compromise.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: tree98 , kozakvod , redbeard , kalsandhu , Waterloo , Chamberpains , LargeCar , victory26





  
  
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