Car is hard to start when hot

[Nitro234]

Hello everyone,

First post here- hoping someone can help me. I acquired a first generation Yaris 1sz-fe as a spare car.

It seems to have an issue with starting when warm, it turns over for ages to the point where I feel it may not start, but it always does. Starts perfectly fine when cold, after a couple of turns.

Spark plugs are new, new air filter, cleaned the maf and no codes on the OBD.

I’m a bit stumped, thinking it may be the coolant temp sensor or something along those lines, anyone got any suggestions?

Many thanks!