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.
MPFI CEC System: Description
Multi-Point Fuel Injection (MPFI) system supplies optimum air/fuel mixture to engine under various operating conditions through use of MPFI Control Unit.
To control amount of fuel injected, an intermittent injection system, with an electro-magnetic injection valve (fuel injector), opens for short bursts. Amount of fuel injected is determined by duration of an electric pulse applied to fuel injector. See SUBARU VACUUM DIAGRAMS in EXHAUST EMISSIONS section.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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