How to Clean Fuel Injectors Part1 Using a Fuel Injector Cleaning Kit 1.Purchase a fuel injector cleaner kit with a PEA cleaning fluid. Look for a cleaning kit that is suitable for your type of vehicle. Each kit should come with a canister of fuel injector cleaner and a hose that attaches to the fuel injector and fuel rail.[1] For the best results, opt for a cleaning fluid that contains polyetheramine (PEA), which will dissolve thick carbon deposits more effectively than other ingredients. .
