TBH the uneasy starting from cold began with the E85 kit fitting in 2017, rather easy in the high season and uneasy in the low one. It's a very well known problem with ethanol. It looks weird that the engineer that designed my premium & best seller E85 kit didn't thought about the approx. more ou less 25% more petrol needed when firing up from cold.Starting difficulties are usualy linked with IMG when starting from cold since water comes imto st or 4th cylinder. Not sure how I could tie starting difficulties when engine is hot to HGF. Maybe something else was changed as well which was the culprit to problems with starting when hot.
I would rather look into system installed for E85 and potential for fuel to evaporate when engine components are hot.
But the difficulties when starting from hot were very recent and happened simultaneously with the coolant loss increase (HGF).
When my mechanic did the job he has just taken off the Biomotors kit - which is plugged just before the injectors - and he refitted it back afterwards, no setting being changed in the meantime. I can't see how the kit may be involved.
Moreover the starting from hot is now perfect as it was in the beginning and as it should be, and even the starting from cold looks now improved. Hard to think about anything else than something in the cylinder head (gasket?) or very close to it.
Let's see in the weeks to come...