Water/Methanol Injection Install (Throttle Body Spacer) - Mazda CX-7

Direct injection spark ignition (DISI) engines have a serious bottleneck when it comes to fueling. Larger fuel injectors do not exist, thus max fuel and power is limited to the stock fueling system. The easiest and cheapest way to add more fuel to the Mazda 2.3L MZR engine is to add a water/methanol injection (WMI) system. This is done by injecting a mixture of distilled water and methanol (usually 50% of each) to the air intake before it reaches the combustion chamber. A throttle body spacer is the simplest way to do so. More fuel means more power! Step drill bit: https://amzn.to/4jzZYLB Relay: https://amzn.to/4lvxYdB Switch: https://amzn.to/4lqVWqm Wire: https://amzn.to/4luKsCm Wire loom: https://amzn.to/3G7COOd WMI full kit: https://amzn.to/4299JdI WMI pump: https://amzn.to/42KobZK WMI tubing: https://amzn.to/4lAkxtc WMI check valve: https://amzn.to/3E8jrUB WMI nozzle: https://amzn.to/4jB1RHT Boost juice: https://amzn.to/4jbFb15 00:00 – Intro 00:11 – Remove intercooler 00:44 – Remove boost tube (throttle body side) 00:55 – Remove throttle body 01:35 – Remove washer fluid reservoir 02:22 – WMI parts 02:33 – Install WMI reservoir bung 03:54 – Leak test washer fluid reservoir 04:00 – Install washer fluid reservoir 05:00 – Connect WMI tubing to washer fluid reservoir 05:26 – Remove horn (low tone) 05:59 – Mount WMI pump 07:04 – Connect WMI tubing from reservoir to pump 07:20 – Assemble throttle body spacer 09:51 – Assemble WMI check valve 11:09 – Leak test WMI setup 11:53 – Connect WMI pump to ground 12:18 – Install throttle body spacer 12:47 – Install throttle body 13:03 – Torque throttle body 13:17 – Connect WMI tubing from throttle body spacer to pump 13:41 – Add water/methanol to washer fluid reservoir 14:13 – Install intercooler 15:17 – WMI controller parts 15:28 – Remove glovebox 15:55 – Remove interior trim 16:11 – Install WMI controller 17:20 – Install WMI switch and relay 17:52 – Install interior trim (passenger) 18:16 – Install glovebox 18:39 – Connect WMI controller to harness 18:52 – Install interior trim (driver) 19:03 – Engine bay wiring 19:28 – Remove MAP sensor 19:40 – Splice MAP harness 20:01 – Install MAP sensor and harness 20:10 – Connect WMI pump to power 20:21 – WMI pump wiring 20:35 – All finished As an Amazon associate, I may earn commissions from qualifying purchases.