What can be the problem of my car not starting up without the smell of petrol?

I think we may have a little language barrier here. NOT originally from Iowa ? Not to familiar with Hyundai diesel but at any point , before changing the injectors , did you verify fuel pressure? Are you in the U.S.? I can't find a diesel Santa Fe listed.

I agree with ziptie about checking fuel pressure but I have never even heard of a hyundai diesel

I believe they might be overseas , or the SUV was smuggled in! Kinda like hearing about Honda diesels , they exist (and have for years) but not in the U.S. (yet).

well if they arent in the states then we will probably never see one because I am from Canada...