Power Foam® Carburetor and Induction System Cleaner for Two - and Four-Stroke Gasoline Engines Improves engine performance by removing gum, varnish and carbon deposits that affect power, operation, idle and fuel economy. Power Foam cleans intake valves, intake manifolds and throttle plates to keep the combustion intake system running at peak efficiency. Help reduce engine ping and keep carburettors and injector systems operating like new.