240 L4-2127cc 2.1L SOHC Turbo B21FT FI (1982)
Frequency Valve: Description and Operation
The frequency valve effects fuel flow by influencing the pressure on the underside of a diaphragm in the pressure regulating valves. The frequency
valve operates on a pre-determined electrical frequency and by the varying of the duty cycle. The operation of the valve can be checked by
measuring the duty cycle with a dwell meter. The frequency valve is located on a bracket behind the fuel distributor on the left side of the engine.
