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.
Evaporative Emission Control (EEC)
This system controls purging of the vapor canister. The ECM controls vacuum to purge valve with a solenoid. When engine is cold (open loop), solenoid valve is energized. This blocks vacuum to purge valve.
When engine is warm (closed loop), and engine or vehicle speed is greater than a preset level, solenoid valve is de-energized. This allows vacuum to be applied to purge valve. Fuel vapors are then drawn into the intake manifold for burning. To check function of evaporative emission system, see appropriate component CHART C3 for that system.
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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.