{"nhtsa_id":10076204,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-07-07","date":"2015-10-26","document_id":"TSB-018","mfr_campaign":null,"replaces":null,"component":"ENGINE; FUEL SYSTEM, GASOLINE:STORAGE","mfr_system":null,"summary":"ITT REGULATOR ERRATIC PRESSURE REGULATION. SOME QUANTUM FUEL STORAGE MODULES (FSMS) ARE BUILT AND SUPPLIED WITH ITT PRESSURE REGULATORS AS PART OF THE FUEL STORAGE MODULE. IN SOME CASES, THE HIGH PRESSURE REGULATOR (HPR) MAY NOT RESPOND PROPERLY TO LOAD CHANGES IN THE ENGINE AND MAY HAVE ERRATIC HIGH OUTLET PRESSURE. THIS ERRATIC HIGH OUTLET PRESSURE MAY RESULT IN INTERMITTENT CHECK ENGINE LAMP ILLUMINATION AND POSSIBLY DERATED ENGINE OPERATION. THE FLOW DYAMICS OF THE FUEL EXITING THE HPR IS CREATING AN INSTABILITY AT THE INTERNAL PRESSURE SENSING PORT IN THE REGULATOR.","document":null,"url":"https://open.wenmarpro.com/bulletins/10076204","components":[{"id":"engine","name":"Engine","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"QUANTUM FUEL SYSTEMS LLC.","model":"CNG FUEL TANK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}