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.
1990 Jeep Cherokee Laredo, 2D Utility, AutomaticFACTORY OEM SERVICE PROCEDURE
5.9L V8
- With parking brake on, transmission in Park and A/C off, warm engine to normal operating temperature.
- With ignition off, connect timing light and a properly calibrated tachometer. Disconnect and plug distributor vacuum advance hose. Slightly loosen distributor hold down bolt to allow adjustment.
- With engine idling, check and adjust timing according to specification on Emission Control Information label (if necessary). Tighten distributor hold down clamp and recheck ignition timing.
- With engine off, remove timing light and tachometer. Reconnect vacuum advance hose.
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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