i was thinking when will fire be connected to the engine so that the car stop working when engine is on fire?
If, not when. Don't ask a question with ''when'' in it here ;D. Done when done! But they will connect it someday.
Probably sooner rather than later, although we can't promise it (or anything else) for the next update. Fire is already integrated with thermals in the other direction though; hotter exhaust manifolds are more likely to cause engine bay fires in crashes.