Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Injection System - CFI System: Description
Central Fuel Injection (CFI) system is single point, pulse time modulated injection system. Fuel is metered into air intake stream according to engine demands by single injector, which is mounted in throttle body on intake manifold.
Fuel is supplied by low pressure electric fuel pump mounted in fuel tank. Fuel is filtered, sent to injector and then to pressure regulator. Fuel delivery pressure is maintained at 13-17 psi (9.0-1.2 kg/cm2 ).
Single injector nozzle is mounted vertically above throttle plate. Fuel pressure regulator is downstream from injector in fuel system. Fuel in excess of that needed for engine demand is returned to fuel tank by fuel return line.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.