Fuel Injectors & Injector Sleeves

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

When in ALT mode, compuvalve sends a signal to PCM to turn off gasoline fuel injectors and gasoline fuel pump through bi-fuel relay module. Compuvalve houses 2 types of injectors. The metal-cased injectors are "high flow" and deliver fuel during cruise and acceleration and are ON/OFF devices only. The plastic-cased injectors are considered as "low flow" injectors. They provide idle and trimming flow and are pulse-width modulated as required.

On LPG models, fuel flows from compuvalve to adjustable tuning "T", then to fuel rails. On CNG models, fuel flows from compuvalve to fuel rails. On all models, fuel is delivered from fuel rails to intake manifold through fuel injector sleeves. Fuel injector sleeves are placed in injector seats. Gasoline fuel injectors are placed in fuel injector sleeve seats. The sleeves by-pass gasoline fuel injectors, delivering alternative fuel into intake system.