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 MANUALSJAGUAR1991XJ-6 L6-4.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION CABLETESTING AND INSPECTION
1991 Jaguar XJ-6 L6-4.0L
Ignition Cable: Testing and Inspection
1991 Jaguar XJ-6 L6-4.0LSECTION Testing and Inspection
Ignition Wires:
1. Remove ignition wires from engine.
2. Measure resistance of each wire. Readings should be:
No.
1 5.6k to 13.2k ohms
2 6.0k to 14.0k ohms
3 6.6k to 15.5k ohms
4 7.7k to 18.2k ohms
5 9.5k to 22.3k ohms
6 9.1k to 21.4k ohms
Coil lead 1.8k to 4.1k ohms
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.