Does anyone have a manual for Daihatsu ej-de Enigine ? or Know why the ej-de engine starts up fine, then it stalls out within a period of few seconds ?

They are always right next to the crankshaft pulley. Help in the link.

https://www.google.com/search?q=daihatsu+1000cc+ej-ve+crank+sensor+location

..

Yes certainly can and the Service Manual as well

VALVE CLEARANCE (K3-VE)

VALVULITA https://www.valvulita.com > sites > default > files
(u) Apply engine oil to the cam of the camshaft and the journal part of the cylinder head, and then install the camshaft. NOTICE: Position it so the cam nose of ...
10 pages

Daihatsu TERIOS J100 Maintenance Manual (Page 18 of 43)

ManualsLib https://www.manualslib.com > ... > Maintenance manual
Inspection and adjustment of valve clearance. The measurement and adjustment ... apply engine oil to between the lock nut and the valve. rocker arm. q Remove ...

Tappet clearance 1300cc terios?

Fixya https://www.fixya.com > ... > Daihatsu > Terios
Nov 14, 2019 - The tappet clearance for your Hyundai Atos 2007 would be: ... Valve clearance Warm: 0.2 mm intake, 0.25 mm exhaust. ... Valve clearance Cold: 0.1 mm intake, 0.17 mm ...

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engine stalls AC on.
yes IAC bad is super common but, there are 50 causes.
the other words I do not understand at all
my guess you see and feel enigne misfire.?
well no engine told? ah J100g a engine problem (and EFI)
stalls means engine dies, zero 0 rpm is stalled.(engine goes silent)
if engine power lacks for sure AC and ON.. say so

wiki says
100G 1997-1999 "HC-EJ" SOHC 1295 cc engine 89 PS (65 kW; 88 hp) 4WD
HC-EJ is electronic injected.
the HC has cam timing belt and not one lasted 25 long years
5year/100km is life of belt
if belt is bad power stays low (HP) all the time engine shakes.
base on vast brands of makers of belts
60k to 100k miles is max life. or 160km (meters)odometer readings.
cheap belts go 100km. off fleabay less.(grin)
other causes.
needs new spark plugs.and related parts
air filter packed up , replace
fuel filter easy to find, replaced.
low fuel pressure
bad fuel
injector clogged

See if this helps Replacing Timing Belt Daihatsu Drivers Club UK

https://www.scribd.com/document/487413010/Daihatsu-Engine-Mechanical-EJ-DE-and-EJ-VE

No they will not,

You can get guide from many sites.. i know few
like reliable-store
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

The EGR vaulve is sticking which needs to be changed out.......Hope this helps...

Many Auto Parts stores have the computer that specify oil weight, quanity needed and viscosity type and filter type and location.

Your engine is probably an EJ-DE twin cam 12 valve.

Generally Daihatsu belts have marks on them that line up with dimples on the sprockets for the intial phasing. You rotate the engine to top dead centre on No1 piston and install the belt from there. The cams should be not be putting any pressure on the intake and exhaust valves of No1 when phased correctly.