Electronic Fuel Injection Control Unit
The Electronic Fuel Injection (EFI) Control unit consists mainly of 3 integrated circuits formed on a printed circuit board. The control unit receives electrical impulse signals from various engine sensors and exhaust sensors. Upon receiving impulse signals from the oxygen sensor, the control unit adjusts injection pulse width so mixture ratio will be within capabilities of 3-way catalytic converter. Control unit has an exhaust gas oxygen sensor monitor lamp for checking oxygen sensor. During engine warm-up, mixture ratio feedback system is inoperative until oxygen sensor reaches operating temperature.