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.
1987 Mitsubishi Starion ESI-RFACTORY OEM SERVICE PROCEDURE
HAC System: California
- Engine coolant temperature should be 185-205°F (85-95°C). Remove air filter. Disconnect Black vacuum hose from carburetor primary emulsion well bleed nipple. Plug nipple at carburetor. Connect vacuum pump to vacuum hose and apply vacuum. On low altitude models, 3900 ft. (1200 m) or less, vacuum should hold while running engine at idle. On high altitude models, vacuum should leak.
- Reconnect hose to carburetor. Run engine at idle and check ignition timing. See IGNITION TIMING SPECIFICATIONS table. On low altitude models, with engine at idle, disconnect White-striped vacuum hose from HAC. There should be vacuum.
Factory Service Tools
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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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