Mannol 9873 intake throttle valve cleaner is a professional aerosol formula engineered to clean the intake system of petrol engines without disassembly. it effectively removes carbon soot resin and oil deposits from intake valves throttle bodies idle control valves and egr systems. restoring smooth idling enhanced power delivery and reduced fuel consumption. this cleaner also helps eliminate black smoke during acceleration and supports easier cold starts. developed in germany with high quality performance standards it is safe for catalytic converters oxygen sensors and turbochargers while temporarily using acetone which requires careful application. simply spray into intake air path during idling at 2000 rpm then allow engine to run briefly to burn off residues. ideal for engine tune up maintenance and restoring airflow efficiency in modern direct injection petrol engines.