nothing rude and no offence taken... need to hear it all. 20 years ago I was a Ford mechanic... didn't like being told by the service manager to tell people the need things they really didn't. I've been an O/O for about 24 hrs now... I want to learn as much as I can ,to do things myself, and I hope I am someday posting answers not questions here.
Tell me more about Insite and Nexiq link.
I don't plan to let this engine be a pain in my arse.
thanks again Ashman!
Cummins ISX CM871 Technical discussion
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Rawze, Aug 13, 2013.
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B) Its normal for the oil temp to be 20 or so degrees above the coolant temp.
C) Prostars have NO WAY to see the codes,...Its a fact,...Your FIRST investment into your new business should be a DLA (Nexiq USB-link or an Inline-5) and a laptop of sorts.
D) The engine warn light could be anything but I seriously doubt its oil related. Probably low coolant, crank case, DOC face-plug or some other goofy thing.
Anyone buying a used truck should expect to have problems up front. Anything less would be like wishing for fools gold to be hidden under the sleeper bunk. The question you need to be asking yourself is...'As a new business Owner, how are you going to go about facing these new challenges?',...You are now the proud owner of a 'Red Motor',... A CM871 at that,...A motor that is notorious for 'cryig and complaining' to its owner when it has been neglected for very long. A motor that 'Likes' to be worked on. Like a young spoiled child, it demands constant attention. YOU, as the new 'Parent' to this potential problem child, need to learn very quickly now, how to care for it, satisfying its needs. The only way you will be able to do this, is to be able to understand its complaints, then act upon them in an intelligent, cost saving manner. Unfortunately for you, your new child cannot tell you what it needs. This is the drawback of owning a Prostar. My advice is for you to invest NOW,...early on,...in a DLA. It will pay for itself in very short order, and once you have one, you will be able to stop the money from pouring out of that huge hole in the bottom of your pocket. Get your truck looked at, of coarse for now by the place that sold it to you, but buy a DLA while your at it, or your road to moving freight is going to be short lived.
Just some outside perspective,...RawzeLonestar, bubbanbrenda, VLSanders2013 and 4 others Thank this. -
here is the link,...
http://od.lk/72bVLSanders2013, Rocks, Ashman_42 and 2 others Thank this. -
It looks to me like(on page 3 second picture) they are about the same "size" but the pressure sensor looks like it' s the one closest to the flange, the temp sensor appears to be closer to the block.
Rawze Thanks this. -
How about using a small DC Bench type power supply to substitute the engine sensor output voltages to the ECU...
Is there information as to what sensors put out what voltage under different conditions, eg. what voltage from the sensor reads 205 degrees on the trucks oil temp guage etc....
You should be able to do the same with all sensors that send a simple DC voltage to the ECU to substitue for the sensor.
With this type of info , one could pull the sensor plug, substitute the supply voltage , that would check the guage, wiring etc in one shot, rather than go around changing sensors for no real reason... especially if you don't have a box of all your sensors handy...
Where would one find a list of parameters supplied to the ECU when things are running normal in a test condition, if we ever got a new truck I would like to have this list for benchmarks, even an old truck that was running good should have a list of benchmarks for all the sensors I would think.
Is this info supplied with the NexiQ software. If so why do they just keep blindly replacing this stuff in the shops?? -
As the boss of most shops would put it,...There's more money to be made in patching up 25 trucks in a day, then to spend all day trying to solve all of the problems of just one.
The corperation I was signed onto had 3 levels of problem solvers,...Parts changers (they follow the troubleshooting guide only),...very fast at solving simple problems,...then there were basic tech's,...Troubleshooting the problem on a basic level, usually solving it by the time they left,...but if not,...Specialists,...The one guy who will sit ALL DAY watching a perfectly running machine, waiting for that illusive minute 'Glitch', that causes the failure.cumminskid123, Rocks, BeN DaViS and 2 others Thank this. -
I had a guy call me recently with a cm870. Blowing black smoke, low boost low power and running hot. They had taken it to a dealer where the 'trained tech' had spent all day 'diagnosing' the problem. They were sent home with a egr cooler and a egr valve because the egr cooler was 'blocked'. They called for a second opinion. I drove out to thier garage, hooked insite up and did the turbo/ egr fitness test that Cummins put in the program. Turbo failed twice. After I called the customer to report the findings, he asked how I did it so quickly. I responded 'by using the same program the dealer has'. The next day the mechanic asked how I knew the turbo was fried? cause the backside fins were completely burnt off. The dealers have the technology they just choose not to use it or are not trained to. So they throw parts at it untill the problem is solved, then they kick a guy out the door making 30% on the parts. Sick
TheLoadOut, Randallizer and Rawze Thank this. -
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deming807, Rawze, Randallizer and 2 others Thank this.
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I agree that the tech who troubleshot that complaint had no idea what he was doing but I can not agree with the concept of immediately going after a component that costs over $2,000. My biggest issue with the repair industry as it stands today is not the lack of "qualified technicians" as it seems if you can retain knowledge from a book or computer led instructions you too can be a "qualified" technician, but a lack of technicians who understand how the engines operate. Now I don't claim to be amazing at what I do but from what I see in the shops I've worked for many people are hired as if they are gods gift to engines because they have thousands of certifications that say they are apt. I worked with a technician not long ago that if I were a customer and he was to explain to me how diesel engines operate and all the systems around them I would think I had just hit the repair tech jackpot. But the moment you put a wrench in his hands and asked him to perform even the simplest of repairs he had no idea what he was doing. Another problem I see is technicians who have been in this industry for decades but have chosen to not keep up with the technology and instead of learning it they go with old school thinking and attempt to repair newer style units and the unit continually comes back over and over again usually crapping out the same component they just replaced. The very first thing I check when a unit comes in with the symptoms given would be the intake manifold boost/pressure sensor. As if this sensor fails in range causes the same symptoms that were just outlined. I find it appauling these engines and unit we work on are HUGE investments for someone especially owner operators and should be viewed as such. And to see people I wouldn't trust to change my oil T/S a problem on something someone has their livelihood resting on is just sickening. I mean imagine you owned something like a Maserati and someone with this sever lack of ability were to work on it, I bet there would be court cases left and right. Being that majority of drivers are more of the blue collar and not of the white I think plays a giant role in it as companies thinking "hey, that driver cant afford a lawyer. Theyll just take out another loan and buy another truck"
cumminskid123, MAGMAN55 and Rawze Thank this.
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