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 MANUALSMITSUBISHI1990PRECIS BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - PFIFUEL SYSTEMFUEL CONTROLFUEL INJECTORS
1990 Mitsubishi Precis Base, Standard
Fuel Injectors
1990 Mitsubishi Precis Base, StandardSECTION Fuel Injectors
- Using a stethoscope, check operating sound of injector(s) during engine cranking or idling. If clicking sound is heard, injectors are okay. If clicking sound is not heard, go to step 2).
- Disconnect injector electrical connector. Measure resistance between injector connector terminals. At 68°F (20°C), if resistance is not within 13-16 ohms, replace injector.
- If resistance is within specification, check injector wiring circuit for open or short to ground. If wiring circuit tests okay, replace injector.
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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.