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 MANUALSHYUNDAI1990EXCEL GLS, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSFUEL SYSTEMFUEL CONTROLFUEL INJECTORS
1990 Hyundai Excel GLS, Automatic
Fuel Injectors
1990 Hyundai Excel GLS, AutomaticSECTION Fuel Injectors
- Using a stethoscope, listen for fuel injector operation during idle or cranking. The sound should be produced at shorter intervals as engine speed increases. Ensure the sound from an adjacent injector is not mistaken as the sound of an inoperative injector.
- Turn off engine and disconnect fuel injector connectors. Using an ohmmeter, measure resistance between fuel injector terminals. At 68°F (20°C), resistance should be 13-16 ohms.
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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.