Additive and cleaning products such as Cataclean claim to clean a vehicle's catalytic converter, oxygen sensors, fuel injectors, and cylinder heads. Customer reviews tout different results, but we Place the stethoscope or rubber hose against the injector and listen at the other end to hear if the injector clicks. Remove the spark plug wire or disconnect the coil pack or remove the coil pack that goes to that cylinder. Start the engine. It should sound the same. Remove the spark plug. To put things bluntly; yes, fuel injector cleaner does work, but only if you’re using it correctly. As explained earlier, it is able to remove carbon and other deposits in fuel lines, but in Techron it is added in low quantities, meaning it can take up to 5 full tanks of fuel before deposits are removed. Injector cleaners do work, but you have to get the right stuff. Most car manufacturers that have direct inject engines also have a fuel system additive available. For instance, Audi has an additive that is used when any of the direct inject engines start experiencing cold start misfires due to carbon build-up on the injectors. Do fuel injector cleaners actually work? Fuel injector cleaners are designed to remove deposits from the injectors, but they don't always work as advertised. In some cases, they can actually make the problem worse by damaging the injectors. When used correctly, fuel injector cleaners can be effective at cleaning deposits from the injectors. After unscrewing the lid, pour fuel injector cleaner into the container. Next, hang the canister on the underside of the hood to ensure you have a steady flow of cleaner into your vehicle’s fuel injectors. Then, screw the hose end onto the vehicle’s fuel rail at the test port. .

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