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 MANUALSCADILLAC1991SEVILLE STSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSFUEL SYSTEMFUEL CONTROLFUEL INJECTOR(S)
1991 Cadillac Seville STS
Fuel Injector(s)
1991 Cadillac Seville STSSECTION Fuel Injector(s)
Disconnect fuel injector harness connector. Measure resistance across injector terminals at each injector. Resistance should be as specified. See FUEL INJECTOR RESISTANCE table.
FUEL INJECTOR RESISTANCE
| Application | (1) Ohms | ||||
|---|---|---|---|---|---|
| 2.0L (VIN K) | 1.6 | ||||
| 2.2L (VIN G) | 1.6 | ||||
| 2.3L (VIN A & D) | 1.9-2.1 | ||||
| 2.5L (VIN R & U) | 1.6 | ||||
| 3.1L (VIN T) | 12.0-12.4 | ||||
| 3.3L (VIN N) | (2) | ||||
| 3.4L (VIN X) | 12.0-12.4 | ||||
| 3.8L (VIN C) | (2) | ||||
| 5.0L (VIN E) | 1.2 | ||||
| 5.0L (VIN F) | 16.2 | ||||
| 5.7L (VIN 7) | 1.2 | ||||
| 5.7L (VIN 8) | 10.0 | ||||
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NOTE:
If injectors are dirty, they should be cleaned using approved injector cleaning procedure before performing INJECTOR BALANCE TEST.
RENDER: 1.0x
NO RELATED
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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.