07 rx8 suddenly needs to have the accelerator pressed in order to start

Car was starting fine, then went from three cranks to start to not wanting to start, I've changed the battery recently because of this, and done all the necessary procedures, car is running well once going,but I have to press accelerator to start, I'm going to start looking at the fuel system next but would like to know if anyone has come across this before to save me time, money etc, also sat navigation is in English but on street entry, destination entry all the places seem to be in France, eg la grande rue etc inst
end of united kingdom destinations, if anyone could help with any of these problems I would be grateful thanks, sat navigation since battery change was fine before

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07 rx8 suddenly needs to have the accelerator pressed in order to start