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.
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HOMESERVICE MANUALSSUBARU1989GL 4D SEDAN, 1.8 4, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMSYSTEM/COMPONENT TESTSIDLE CONTROL SYSTEMFAST IDLE CONTROL DEVICEJUSTY
1989 Subaru GL 4D Sedan, 1.8 4, 4WD
Fast Idle Control Device: Justy
1989 Subaru GL 4D Sedan, 1.8 4, 4WDSECTION Justy
- Turn A/C switch on, if equipped. On models without A/C, turn headlight, heater blower, rear defogger and radiator fan on. Ensure Fast Idle Control Device (FICD) solenoid operates.
- On auto. trans. models, ensure vacuum is applied to mixture by-pass actuator. See Fig 1 . On all models, ensure vacuum is applied to idle-up actuator. If necessary, check and adjust actuator so it opens .030" (.76 mm) man. trans. or .034" (.86 mm) on auto. trans. models. See Fig 2 .
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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.