Where are the glow plugs located on a Toyota 14B engine

The glow plug timer on a Toyota KUN25R diesel engine is typically located on the engine control module, near the engine's air intake system. It's a small, electrical component that is responsible for controlling the heating of the glow plugs, which are used to warm up the engine in cold weather conditions. The exact location may vary depending on the specific model and year of the vehicle, so it's best to consult the vehicle's service manual for a detailed illustration and information.

NO YEAR told or COUNTRY.told (sad face) 1969 to present
and clones made in CHINA,,amazing fact that. they did.
a huge bus, not a car , not a light truck a bus.
why not post to real toyota forums? OEM forums are best
we are not toyota. and books for buses are rare and not free.
21 different engines world wide, wow.
but sure it is this. one.
3.7 L 14B I4,, direct injections.
3.7-liter inline-four eight-valve OHV direct injection diesel engine

so fuel filters filthy bad gee air was so we'd assume fuel is.
or bad fuel(old or water contam)
weak fuel pump. (all) or not purged off all air
fuel pressure not at spec.
injectors 1/2 way clogged.

Cam shaft wear probably due to mileage or incorrect grade of engine oil and poor servicing.

https://www.manualslib.com/manual/1092617/Toyota-3b.html?page=1#manual

https://www.manualslib.com/manual/1092617/Toyota-3b.html?page=246&term=Torque+Specifications&selected=1#manual

I need torque specs for toyota coaster bus 14B engine, con rod bearing cap bolts and main bearing

Hey

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no name on car, ??? model? or year?
really? ahhhhh a dyna van.... what series? U60?
3.7-liter 14B engines. Diesel.

lots of reasons for overheat. many.
from simple to complex.
lost radiator cap (or bad)
to engine block cracked, (just did one, my self, every step)
take it to any service shop.. they will find it.

EOBD II Error Code: P0380
Fault Location:
Glow Plug/Heater Circuit Malfunction
Possible Cause:
1.No Pre-Glow Period.
2.Poor Cold Starting.
3.Wiring harness.
4. Glow plug relay.
6. Fuse.
7. Glow plugs.
8. Engine control module (ECM).
Possible Solutions:
Check Glow Plug Wiring.
Check Glow Plug(s).

I would change fuel filter any way only £6 delivered on ebay then i would start looking at glow plugs and relays first check to make sure glow plugs are getting a live feed bad side glow plugs are located under drivers seat side of engine so not easy to get at unless you remove seat carpet and engine covers

Gasoline engines dont use glow plugs. glow plugs are for diesel engines some people call glow plugs as heater plugs, but well, if you are refering to a toyota corolla, then you must have been refering to the SPARK PLUGS. trace the four long wires(high tension wires) that goes to the engine, pull the rubber boot and you will see the spark plugs, its kinda deep though so you will need a flashlight.