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| Home / Car Engines / Toyota Engines / Toyota 3UR-FBE |
Toyota 3UR-FBE Troubleshooting
| Engine difficult to start or won't start |
No gasoline in tank - Add gasoline.
Low-quality gasoline - Use quality fuel.
Air in the fuel pipes - Bleed the fuel pipes.
Spark plug wiring connection is damaged - Check the spark plug wire connection, repair or replace.
Spark plug is defective - Change spark plug.
Defective ignition - Check ignition and replace faulty components.
Plugged fuel filter - Replace fuel filter.
Dirty fuel lines - Clean fuel system lines.
Dirty or defective fuel pump - Check fuel pump and replace if necessary.
Dirty or damaged fuel injectors - Service or change fuel injectors.
Engine has bad compression - Check cylinder block and change wear parts.
| Rough engine running |
Ignition system malfunction - Inspect ignition system and change failed components.
Air filter element is plugged - Change or service air filter.
Damaged spark plug - Spark plug need to be replaced.
Fuel pump is faulty or clogged - Clean or install new fuel pump.
Improper valve clearance - Adjust to proper valve clearance.
Ignition timing is incorrect - Adjust ignition timing correctly.
Incorrect low idle setting - Adjust idling as required.
| Engine starts but immediately stops |
Damaged spark plug - Spark plug need to be replaced.
Clogged or defective fuel injectors - Check fuel injectors and replace if necessary.
Faulty ignition coil - Ignition coil must be replaced.
Bad or broken valve springs - Replace valve springs.
Stuck valves - Valves must be cleaned.
| Engine overheats |
Engine oil level is insufficient - Fill the crankcase with engine oil.
Engine overload - Reduce load.
Fuel injectors are clogged - Need to clean fuel injectors.
Ignition timing is incorrect - Adjust ignition timing as required.
Valve setting is improper - Set the valves properly.
Radiator core is dirty or radiator cap is damaged - Install new cap or clean radiator.
Coolant level is low - Refill to the correct level and inspect system for leaks.
Thermostat is faulty - Thermostat need to be replaced.
Defective water pump - Change water pump as required.
| Engine knocking sound or abnormal noise |
Stale fuel - Use proper gasoline.
Excessive engine load - Reduce engine load.
Engine oil insufficient - Fill up the engine oil.
Low idle speed setting is incorrect - Correct idle settings.
Fuel pump is damaged or dirty - Check fuel pump and change if required.
Crankshaft or main bearings wear - Install new parts as as required.
Valve clearance is not correct - Need to adjust valve clearance.
Worn piston rings or cylinder bore - Change faulty components.
| Lack of engine power |
Dirty or defective fuel injectors - Service or replace fuel injectors.
Plugged air filter - Service or replace air filter.
Fuel pump is defective or dirty - Service or replace fuel pump.
Defective ignition - Check ignition and replace faulty components.
Defective cylinder head gasket - Change cylinder head gasket.
Valves are burned or stuck - Replace or clean valves.
Cylinder block parts are faulty - Defective parts need to be replaced.
Oil filter element is plugged - Replace or clean oil filter.
| High fuel consumption |
Air filter is dirty - Service or change air filter.
Fuel injectors are damaged or dirty - Clean or change fuel injectors.
Spark plug is defective or loose - Re-tighten or replace spark plug.
Ignition timing is incorrect - Adjust ignition timing as required.
Burned, worn, or stuck valves - Service or replace valves.
Rings, sleeve, or piston are damaged - Replace defective parts as required.
Incorrect valve clearance - Adjustment procedure required.
Low cylinder compression - Check cylinder block and replace worn parts.
| Engine oil consumption is too high |
Damaged seals or gaskets - Replace to repair leaks.
Worn valve stems and valve guides - Change the valves.
Stuck or defective piston rings - Change piston rings.
Damaged cylinder liner or piston - Inspect liner and piston, fit new parts as necessary.
| Engine backfires |
Clogged fuel injectors - Test fuel injectors and service if necessary.
Restricted fuel lines - Fuel lines need to be cleaned.
Wrong ignition timing - Adjust ignition timing correctly.
Incorrect valve setting - Valves needs to be adjusted properly.
Air filter is dirty - Replace or clean air filter.
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