bought a 2017 kw w900l

[Marajin]

#1 - EGR tune-up, replace all recommended sensors. IMAP, Exhaust Gas Pres. sensor, etc.

#2 - get an inline-6 adatper, fleebay, and laptop. Get that going ASAP. Can;t work on it if ya can;t see what its crying about.

#3 - Invest in a set of rears that are not going to kill that engine .. 3.25's are nothing but engine killing rears. Thing has likely been lugged to death below 1500 already most its lifge... that is scary all in itself. Engine won;t last 600k miles with those horrible rears. - Puit some 3.79's in it or 3.90's if you want it to last and also go up hilles worth a damn.

#4 - Assuminig for a moment u live in a country that allows such mods -- de-mandate it .. MM program is only way to go, done by one of the top members here, or do it yourself with a little help once u have the adapter. -- leave everything hanging on the side of the engine and hollow out everything ... do it right,.. all cans hollowed + scr hollowed out, egr blocked off,.. the whole nine yards... stop that thing from eating its own waste.

#5 -- replace the guts of the fuel pump at 400k miles (or equivalent hours). u did not mention hours on engine that I can see. 380k miles might be a million miles of wear if someone PTO'd or idled the crap out of it .. what are the hours?

#6 -- learn to drive the damn thing above 1500+ rpm when doing any kind of pulling to make the engine last as long as possible.. ISX hate pulling hard below 1500rpm.. they like to beat up on the liners down in the 1300 and below range..,. again, goes back to some moron putting terrible rears in that thing in a dumba#lrsse attempt to limit HP output, lu the crap out of it, in exchange for a bit of fuel saving.

#7 - go thru the rest of the truck, replace oil in all gearboxes, replace power steering fluid and filter, re-torque all wheel bearings, shocks, and a whole slew of stuff.