Fuel Injector Valves

FUEL INJECTOR VALVES
When in CNG or LPG mode, the Compuvalve instructs the Powertrain Control Module (PCM) to shut off the gasoline fuel injectors and shuts off the gasoline fuel pump through the ALT fuel relay module. The Compuvalve houses two types of injectors. The metal cased injectors are "high flow" and deliver fuel during cruise and acceleration. These are strictly on/off devices. The plastic cased injectors provide idle and trimming flow. These "low flow" injectors are pulse width modulated as required. The fuel is delivered to the intake manifold via fuel injector sleeves (F-Series) or a modified intake manifold (Contour).