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| Home / Car Engines / Toyota Engines / Toyota 3UR-FE |
Toyota 3UR-FE Troubleshooting
| Engine difficult to start or won't start |
Empty gas tank - Fill fuel up.
Wrong grade of gasoline - Use quality gasoline.
Air in fuel tank - Bleed fuel tank.
Spark plug wiring connection is damaged - Inspect spark plug wiring connection, change or repair.
Spark plug is defective - Spark plug need to be replaced.
Ignition failure - Inspect ignition system and change failed components.
Fuel filter is dirty - Change fuel filter.
Dirty fuel lines - Fuel lines need to be cleaned.
Clogged or damaged fuel pump - Service or change fuel pump.
Fuel injectors are clogged or faulty - Inspect fuel injectors and change as required.
Poor compression - Inspect and replace wear parts.
| Irregular engine running |
Ignition system problems - Inspect ignition system and change failed components.
Plugged air filter - Change or clean air filter.
Defective spark plug - Change spark plug.
Clogged or damaged fuel pump - Clean or install new fuel pump.
Valve clearance is improper - Need to adjust valve clearance.
Wrong ignition timing - Set the ignition timing properly.
Low idle speed adjustment is incorrect - Adjustment required.
| Engine starts but stalls suddenly |
Spark plug is damaged - Spark plug need to be replaced.
Clogged or defective fuel injectors - Clean or install new fuel injectors.
Ignition coil is faulty - Ignition coil must be replaced.
Bad or damaged valve springs - Install new valve springs.
Valves sticking - Service the valves.
| Engine is overheated |
Engine oil level low - Check oil level and add oil as required.
Engine overload - Load reducing required.
Fuel injectors are dirty - Need to clean fuel injectors.
Wrong ignition timing - Set the ignition timing properly.
Valve setting is wrong - Set the valves correctly.
Radiator core is clogged or radiator cap is leaking - Clean radiator or change cap.
Insufficient coolant fluid - Add coolant and check the components of cooling system.
Thermostat failure - Replace thermostat.
Faulty water pump - Water pump need to be replaced.
| Engine knocks or noises |
Stale fuel - Use correct fuel.
Excessive engine load - Reduce the load.
Engine oil level low - Fill up the engine oil.
Too low idle RPM - Adjust idling as required.
Fuel pump is defective or dirty - Service or replace fuel pump.
Main bearings or crankshaft wear - Change or repair worn components.
Valve clearance is not correct - Adjust to proper valve clearance.
Worn cylinder bore or piston rings - Replace faulty parts.
| Lack of engine power |
Dirty or faulty fuel injectors - Test fuel injectors and replace if necessary.
Air filter element is clogged - Service or replace air filter.
Dirty or damaged fuel pump - Check fuel pump and replace if necessary.
Ignition failure - Check ignition and replace faulty components.
Cylinder head gasket is defective - Replace cylinder head gasket.
Valves are burned or stuck - Replace or clean valves.
Cylinder block components are damaged - Defective components need to be replaced.
Oil filter is blocked - Service or replace oil filter.
| Engine using too much gasoline |
Air filter is dirty - Service or replace air filter.
Dirty or faulty fuel injectors - Test fuel injectors and replace if necessary.
Loose or defective spark plug - Tighten or replace spark plug.
Ignition timing is improper - Ignition timing needs to be set properly.
Valves are stuck, worn, or burned - Service or change valves.
Rings, sleeve, or piston are damaged - Change defective parts.
Valve clearance is wrong - Adjust to proper valve clearance.
Poor compression - Inspect and replace wear parts.
| High engine oil consumption |
Damaged seals or gaskets - Worn parts need to be replaced.
Worn valve guides and valve stems - Valves need to be changed.
Piston rings are seized or worn - Piston rings need to be replaced.
Scored piston or cylinder liner - Check piston and liner, install new parts as required.
| Engine backfires |
Clogged fuel injectors - Test fuel injectors and service if necessary.
Fuel lines clogging - Fuel lines need to be cleaned.
Ignition timing is improper - Set the ignition timing properly.
Incorrect valve setting - Valves needs to be adjusted properly.
Air filter element is plugged - Change or clean air filter.
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