My Isuzu kb250 diesel engine model 2008 it doesn't want to take gears when running

Question edited for clarity and add maker.
Question moved to maker category.

So the pump wasn't new? Perhaps it was broken?

Air locks in the system?

Help in the link

https://www.google.com/search?q=Isuzu+kb+250+4ja1+stalls+while+idling

..

https://www.cargurus.com/Cars/Discussion-d545_ds703037

https://www.steves.co.za/a-few-potential-faults-on-the-isuzu-kb250/

https://www.cargurus.com/Cars/Discussion-d545_ds703037

to many possibilies. best book in for a full tune up, will save you long walks home unless with breakdown services.

fix the clutch master cylinder and slave cylinder as the clutch is not properly disengaging

You'll need to check to make sure it's getting diesel. Also check to make sure the glow plugs are heating up. When was the last service done?

yet another post on KB to the USA forum that has, ZERO KB here.
welcome to no KB land, USA>
we cant look up engine, at mitchells for cars we dont have/
so good luck.
in what country. KB Africa not KB Austrailia.
no year stated, all online sources worth owl sweat , ask
1: what country, bloke. are you lost on a desert island?
2: what year,????????
3:then,..... see??????
in the USA we can do all that with VIN.

welcome to the USA forum (calif) so....
what car. ? KB250 sounds Australian? is it? we cant guess country
South Africa?
4JK1-TCX (this engine?) (google searches do little there , zero)

A pickup truck.with 2.5L diesel. with direct injection?
and our books (this is USA forum) dont cover AUZ cars.
what year.? 2007 to now? (but what?)

the data of all cars. are indexed by
year, make and model and engine name 4jk1-tcx)
so we cant help you , lacking those facts.
we cant look it for you.
why not stated, country. first. then full engine name. all letters.

what if?
and what if they changed to TTY bolts, in say 2008,..
so what is TTY, its torque to yield. (use one time)
or the changed from KG torque, to degree's from hand tight. methods, and he pattern , do you need the pattern to torque, sure.


I see just these , generations.....
here is the list off the wiki, the CR might change this..spec... too....

• The 4JK1-TC is a 2.5 L (2,499 cc), 95.4 mm bore, 87.4 mm stroke direct injection 16V diesel engine. It was used in the Isuzu D-Max and Chevrolet Colorado inThailand. Stock power was 116 hp (85 kW) and 280N·m at1800-2200rpm.

my guess is the TCX engine ! below>

The 4JK1-TCX is a 2.5 L (2,499 cc), 95.4 mm bore, 87.4 mm stroke direct injection electronic commonrail 16V diesel engine with compression ratio at 18.1:1. It was used in the Isuzu D-Max in Malaysia. Stock power was 136 ps (100 kW) and 320N·m at1800-2800rpm.

what engine is there. some 2.5L but what, gas or diesel?
exactly real engine name... is best.
this usa forum we dont have KB here. ZERO !
and isuzu died here from 2004 to 2008, 1 by 1, ended.
but zero KB here, zero books, and your engines.
you should post to your unstated countries forum on Isuzu.