Engine de carbonization ใช้ไฮโดรเจนล้างภายในเครื่องยนต์

Any shop in Chaing mai that offer engine Decarbonization service?
car maintenance, service garage.
Problem is
-excessive black smoke
-low fuel economy 
-power loss

Common problem in CRDI Diesel engine after 100k-150k plus

any one had experience in solving this issue?