Bongo Fury

Hoping we could get some ideas what can cause my bongo to lose power when she's warm. Going up hill feels like she wont make it. She's a 2.5l diesel auto. Getting a little smoke, hot smell but not overheating, losing coolant.

i would check the fuel filter and banjo filter in the pump, any idea when the filters were changed/cleaned.

it is overdue a service, will get her booked in asap.

you could remove the air filter,as its overdue a service see if this helps.

is that safe to do? where would i find it?

lift drivers seat,the barrel shapped drum in front of you,low down, (if its a diesel).
three clips on the top,lift off the top.remove large filter, replace the top carefully.
then take it for a spin to test.
itl be ok for a short time,but not for ever??.

NB - What about that small pipe that can come off the turbo? Is that worth checking maybe (although why power loss only when hot I'm not so sure)?