Gabor

Hi there! Could any of you give me some advice, what to check on my vehicle? The symptoms are the engine has diesel smell in a past month the car lost power 3 times just for like a second and after that it was fine. i took it to the local garage they had a diagnostic on my car and told me the injector gone, which is apparently £200 per cylinder. May I have some other clues what else could it be? thanks!