Isx15 randomly shutting down

[Rawze]

(05-03-2026 )redtop23 Wrote:  ...
The High pressure pump was rebuilt with new superseded parts at around 600k.

If no one have replaced the guts of that fuel pump in the last 400k miles (or 8,000 hours) ... then it is due/over-due to be done again if the engine has 1+ million on it now.

It does not matter what kind of updated parts they did to its internals, .. the guts need replacing every 400k miles to prevent total a engine destruction that happens with zero warning. - It is well known around here,.. and no,.. the red engine maker has never solved this issue with them, not even on the newest models, or with their newest parts re-designs.

The guts on yours should have been replaced at some point in its past from the ceramic (original) plungers and gits with updated titanium plungers .. I am guessing that is what you are referring to.

Even so, the newer/newest titanium plungers being used are NOT a solution to the problem, but only a band-aide.

Even on the newest engines, pump failure followed by an engine failure is still a big problem that seems to have never really been solved. - Keeping the problem at bay (guts replacements at 8,000 hour intervals) before it happens is the key.

The only thing that has changed, once the pump is updated, is that it now typically takes about 1-2 weeks for the fuel pump to destroy the entire engine .. instead of the only 1-3 days it took with the old ceramic plungers from years back.

I.E.> - Your posts show that Its time to replace it guts again at this point.


It also make me wonder what other things on that truck are far past over-due that you are just learning about for the first time here.

(one example)...
Were the rod/main bearings all replaced at the 800k mile mark?. -- If not, then at 1.1 million, it is a ticking time bomb any ways. It just a matter of time where a piston is going to go thru the side of the engine block with zero warning at this point if this was not done at that mileage/hours. - The N14's had this issue (although it was every 600k miles on them) ,.. the CM570's have always had this issue,.. and the newest ISX engines still have this issue.

(another example)...
When is the last time the power steering filter was replaced?., - Another neglected component by most truck owners, due to the fact they have no clue there is a filter in the bottom of the resiviour,.. then complaining that the power steering pump or gearbox went out.

just a few examples thrown in there, I am sure there are many more.