isx cm871 overspooling

[Rawze]

(09-15-2018 )Crash Dummy Wrote:  After all is said and done, ECM Programming had become corrupted, would not show faults of Turbo, no overspeed, or some other faults, dont ask me how, but this is what i was told. ECM off and Total Wipe, and reprogram. ECM then showed fault of ecm rpm at 150000 when engine was off,this after a test drive, as no faults were seen prior to removal. replaced speed sensor, same effect, different ecm showed same, so, we did some tracing of the harness, seems the speed sensor harness had broken. Replaced harness, and now speed sensor works correctly. My thoughts are someone wasn't paying enough attention when removing head for repairs and separated the harness wiring. We shall see, seems this isn't the first de-mandate performed by the shop I use, but has been the only one that developed the turbo destruction phase, so all were caught scratching heads.
It has been a very long ordeal, hopefully it all is fixed, as I stated before, after demandate, truck performed as it should have for a year, my thought is, if it had been a bad de mandate, I should have seen trouble long before a full year had passed, and the head gasket or turbo blowing much sooner.
Even the pre mandate engines would blow head gaskets, As I have had one i owned before do so, And when I wrenched in years previous. So, that said, A bad delete in my opinion should show its bad side much sooner than what I have experienced.
I do appreciate all the responses i have gotten from those here, and shall continue my pursuit of learning more of the way this engine does what it does here.

Don't fool yourself!. Pull a copy of that program out of that thing, e-mail it to me, and I will inspect the programming for you to see if it looks half decent. Its your $36,000 engine and trucking career you are gambling with there. I have seen people that have run around as blindly as you are right now fooling themselves into thinking the same exact things you just stated only to find out later the hard way they should not have had such blind faith. when someone works on my truck,.. I INPSECT THE WORK TO ENSURE THE JOB THEY DID WAS DONE RIGHT AND NOTHING WAS DONE WRONG!. This is even if i had them do something as simple as change out a tire or U-joint. Treat what someone did inside the engines computer the same way, especially knowing that one small mistake or oversight WILL EVENTUALLY LEAD TO ENGINE DAMAGE!.

Anything LESS and your are only fooling yourself with and taking a blind faithed gamble with your engine, your truck, and your trucking carer!


Does that thing have a boost and pyro gauge in it? -- If not, then you should install them ASAP as well so that you can monitor your boost pressures and pyro to ensure everything is at least "in the ballpark" for that engine and also to help you save fuel / keep an eye on EXACTLY THE PROBLEMS you have been dealing with.

e-mail me the program out of it,.. I will make a report based on what is in it,.. then post it here as a follow-up if you like. Its your truck., at the very least, you should get a second professional, especially considering that the odds are against you greatly when it comes to ECM programming matters.

"You can lead the thirsty horse to water, but if he decides to eat the sand in front of the horse-trough instead, all you can do is shake your head" -- Rawze.