CI system
The B21F engine is provided with a fuel injection system called the CI system (Continuous Injection).
Fuel injectors are open and inject fuel as long as the engine is operating. This system has few moving
parts, is reliable and meets the exhaust emission standards at maximum efficiency.
Air supplied to the engine is continuously measured and determines the amount of fuel injected.
The air flow is regulated by the throttle valve. The air flow sensor and the fuel distributor are integrally
built as a single unit. A lever is actuated by the air flow to produce continuous fuel distribution.
pg. 51 Emission control system
Special instructions for work on the fuel injection system
Extreme cleanliness is essential when working on the injection system. Great care must be observed.
Injection system service should be handled by qualified technicians, using equipment intended for this
service.
Fuel (91 octane RON)
B21A carburetor engines for Canada require 93 octane gasoline.
Unleaded fuel permitted for all models and required for certain models (with catalytic converter).
A label on the instrument panel and on the rear fender, near the filler outlet, will remind of this
requirement.
It is unlawful to dispense leaded fuel into a vehicle labeled "unleaded gasoline only".
Lambda-sond
TM
(oxygen sensor) system: Selected models only
This is an emission control system designed to reduce emissions and improve fuel economy. An oxygen
sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed
into an electronic unit which continuously influences a frequency valve. This adjusts the air-fuel ratio to
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