{"id":"mech-engine-decarbonisation","category":"mechanic","name":"Engine decarbonisation","description":"Cleaning carbon deposits out of a running engine without stripping it — usually a hydrogen or ultrasonic machine connected to the intake for half an hour or so — to free sticky valves, EGR and turbo vanes, and recover lost power, smoother idle and a cleaner emissions test. A fix for a clogged DPF or a worn engine it is not.","aliases":["carbon clean","hydrogen cleaning","descarbonización","EGR cleaning","emissions test failed"],"vehicle":["auto"],"typicalDurationMin":60,"status":"active","_meta":{"sourceHash":"sha256:8e3f45c7b3050069e6ac67044fbdc446bc24c0dc3560a2b53f47a31f98b092fc","locale":"en","fields":{"name":"human","description":"human","aliases":"human"}},"generatedAt":"2026-10-13T19:49:07.661Z"}