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| Home / Car Engines / Toyota Engines / Toyota 2RZ-FE |
Toyota 2RZ-FE Troubleshooting
| Engine is not starting or hard starting |
Empty gas tank - Fill fuel up.
Low-quality gasoline - Use quality fuel.
Air in fuel tank - Bleed fuel tank.
Spark plug wiring connection is damaged - Inspect spark plug wiring connection, change or repair.
Spark plug is damaged - Change spark plug as required.
Defective ignition - Inspect ignition system and change failed components.
Fuel filter is plugged - Fuel filter needs to be replaced.
Dirty fuel lines - Clean fuel lines.
Fuel pump is damaged or dirty - Clean or replace fuel pump.
Clogged or damaged fuel injectors - Service or change fuel injectors.
Low engine compression - Inspect cylinder block and change defective components.
| Rough engine running |
Ignition failure - Inspect ignition system and change failed components.
Clogged air filter - Change or clean air filter.
Spark plug is faulty - Spark plug need to be replaced.
Fuel pump is faulty or clogged - Clean or replace fuel pump.
Incorrect valve clearance - Adjustment procedure required.
Ignition timing is improper - Set the ignition timing properly.
Low idle speed setting is not correct - Test and adjust.
| Engine starts and then shuts off |
Defective spark plug - Install new spark plug.
Fuel injectors are clogged or faulty - Inspect fuel injectors and change as required.
Defective ignition coil - Change ignition coil as required.
Weak or damaged valve springs - New valve springs need to be installed.
Valves sticking - Valves need to be cleaned.
| Engine overheats |
Engine oil insufficient - Check and refill engine oil.
Engine is under excessive load - Load reducing is recommended.
Dirty fuel injectors - Service or change fuel injectors.
Bad ignition timing - Set the ignition timing properly.
Wrong valve setting - Adjust valves correctly.
Clogged radiator core or damaged radiator cap - Clean radiator or change cap.
Engine coolant is insufficient - Fill radiator to proper level and check components for faults.
Thermostat failure - Replace thermostat.
Water pump is defective - Water pump need to be replaced.
| Abnormal engine knocking or noise |
Stale or low octane fuel - Use correct fuel.
Engine overloaded - Reduce engine load.
Not enough engine oil - Fill the crankcase with engine oil.
Low idle speed setting is not correct - Correct the settings.
Fuel pump is defective or dirty - Clean or change fuel pump.
Worn crankshaft or main bearings - Install new parts as as required.
Improper valve clearance - Adjust to proper valve clearance.
Cylinder bore or piston rings are worn - Replace defective parts.
| Loss of engine power |
Fuel injectors are defective or dirty - Check fuel injectors and replace if necessary.
Air filter is blocked - Clean or change air filter.
Dirty or defective fuel pump - Clean or replace fuel pump.
Ignition failure - Inspect ignition system and change faulty parts.
Cylinder head gasket is blown - Replace the gasket as required.
Valves are stuck or burned - Change or service valves.
Faulty cylinder block components - Replace defective components as required.
Oil filter is dirty - Service or change oil filter.
| Engine using too much gasoline |
Air filter is blocked - Service or replace air filter.
Fuel injectors are faulty or clogged - Service or replace fuel injectors.
Loose or faulty spark plug - Re-tighten or replace spark plug.
Bad ignition timing - Set the ignition timing properly.
Valves are worn, burned or stuck - Change or clean valves.
Rings, sleeve, or piston are damaged - Change defective parts.
Incorrect valve clearance - Adjustment procedure required.
Poor cylinder compression - Check cylinder block and change worn parts.
| Excessive engine oil consumption |
Worn seals or gaskets - Change worn parts according to specifications.
Valve guides or stems are damaged - Install new valves.
Piston rings are defective or worn - Have piston rings replaced.
Piston or cylinder liner is damaged - Check piston and liner, change as required.
| Engine backfires |
Dirty fuel injectors - Clean or change fuel injectors.
Restricted fuel lines - Clean fuel lines.
Wrong ignition timing - Set the ignition timing properly.
Incorrect valve setting - Valves needs to be set correctly.
Clogged air filter - Replace or clean air filter.
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