To perform a water injection treatment you will need to attach a hose to the throttle valvebutterfly. Unplug vacuum line, attach hose with 1.5litres of water on the other end in a container, Turn on the already warm engine and let the vacuum line suck the water out of the container. The car will not sound good, but just keep it above 3800RPM and it will eventually suck it all through the system and clean it out, The exhaust will smoke profusely during this process. When it finally starts to stop smoking and the car starts sounds normal again, the process is nearly complete. Turn the car off, Disconnect the hose used to connect the container to the engine vacuum line then cap the line, and restart your engine. let it run for a few minutes to blow out any last bit of water. The whole process should take about 3 minutes.