Glossary/Component List (Digifant II)

DIGIFANT II

AIR FLAP POTENTIOMETER
A variable resistor connected to the air flow sensor that provides a signal for determining fuel system enrichment. Location: internal component of air flow sensor (not available separately).

AIR FLOW SENSOR
Measures the amount of air entering the intake manifold and sends a voltage signal to the electronic control unit. Location: attached to air filter housing.

BAR
Unit of measurement pressure - 1 bar is approx. 14.5 Psi.

COOLANT TEMPERATURE SENSOR
A sensor for measuring engine coolant temperature to determine cold running engine operation. Location: Front side of cylinder head between No.3 and 4 cylinder.

ELECTRONIC CONTROL UNIT (E.C.U.)
Provides the proper actuation signal to the injectors and optimum ignition timing point based on inputs from other system components. Location: inside engine compartment, left side in plenum.

FUEL FILTER
A filter which removes foreign particles from the fuel system. Location: Attached to fuel reservoir in front of the fuel tank on the right side.

FUEL PUMP
An electric pump which delivers fuel to the injectors. Location: Inside the fuel reservoir.

FUEL SCREEN
A strainer which removes foreign particles from the fuel system. Location: in front of fuel pump, inside fuel reservoir, inlet of each injector and inlet of fuel pressure regulator.

IDLE STABILIZATION VALVE
Electronically controlled valve used to maintain idle speed at a pre-determined level by regulating intake air at idle. Location: rubber mounted to top of intake manifold and valve cover.

INJECTOR
Electronically activate valve which directs a cone-shaped mist of fuel into the intake port near each intake valve. Location: mounted into the intake manifold at the cylinder head.

KNOCK SENSOR
A piezoelectric crystal which generates a small voltage. This voltage signal is sent to the E.C.U. to correct ignition knock or detonation. Location: next to No.2 cylinder on engine block.

OXYGEN SENSOR
Used to detect the amount of oxygen in the exhaust gases. Location: threads into catalytic converter housing on 105 hp. Threads into exhaust manifold on 100 hp.

PRESSURE REGULATOR
A diaphragm type regulator used to maintain system pressure at a given value. Location: Bolted to left side of the fuel injector assembly.

RESIDUAL PRESSURE
Fuel pressure in the fuel injection lines after the engine has been turned off

TRANSFER PUMP
Supplies the fuel pump reservoir with fuel from the tank. Location: Inside the fuel tank attached to the fuel tank sending unit.

THROTTLE SWITCH
Provides closed throttle and full throttle signal to the E.C.U. for idle stabilization, deceleration fuel shut-off and full load enrichment. Location: Mounted to the throttle valve housing.