Symptoms
Rough or hunting idle, hesitation, or a hiss under the hood.
The fix, step by step
- Start with a tune-up: plugs, cap, rotor and wires.
- Then check every vacuum hose, since IH8MUD members point to vacuum leaks as the most likely cause on the 3F-E.
- Replace hard or cracked hoses rather than patching them, and recheck the idle once warm.
- Trucks over 200,000 miles will probably need a full set of vacuum hoses.
Tools & part numbers
- Vacuum gauge
- smoke tester or carb cleaner spray
- vacuum diagram
- hose and clamps
Where to buy the parts
Spark plug set, 8/1987–12/1989 FJ62 3F-E (IGN01064SET6)CruiserTeq ↗Amazon ↗
Spark plug wire set, 8/1987–1/1990 FJ62 (IGN21451)CruiserTeq ↗Amazon ↗
Distributor cap, FJ62/FJ80 3F-E (DISTC61240)CruiserTeq ↗Amazon ↗
Distributor rotor, FJ62/FJ80 (DISTR61240AFT)CruiserTeq ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Toyota Land Cruiser FJ62 parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.