Does driving with the VVT valve disconnected consume more fuel?

[McVivienne]

Driving with the VVT valve disconnected consumes more fuel. Definition of the VVT valve: It refers to the Variable Valve Timing system, a technology used in automotive piston engines. The Variable Valve Timing system (OCV/VCT) consists of an electromagnetic valve (OCV) and a Variable Camshaft Timing (VCT) adjuster. By adjusting the camshaft phase of the engine, the intake volume can change with the engine speed, achieving optimal combustion efficiency and improving fuel economy. Working principle of the VVT valve: The crankshaft drives the camshaft through a timing belt, gears, or chain. The profile and position of the cam lobes on the camshaft are typically optimized for specific engine speeds, which usually reduces torque at low speeds and power at high speeds.