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| Home / Car Engines / Toyota Engines / Toyota 2VZ-FE |
Toyota 2VZ-FE Troubleshooting
| Engine starts up hard or won't start |
No fuel in fuel tank - Add fuel.
Wrong fuel grade - Use correct fuel grade.
Clogged fuel system - Remove clogging.
Spark plug wire is disconnected or loose - Inspect spark plug wiring connection, change or repair.
Defective spark plug - Spark plug need to be replaced.
Defective ignition system - Test ignition and replace failed parts.
Clogged fuel filter - Replace fuel filter.
Dirt in the fuel lines - Clean fuel system lines.
Fuel pump is dirty or defective - Clean or replace fuel pump.
Clogged or damaged fuel injectors - Test fuel injectors and replace if necessary.
Poor compression - Inspect and replace wear parts.
| Engine runs intermittently |
Ignition system failure - Inspect ignition system and change failed components.
Dirty air filter element - Clean or replace air filter.
Spark plug is damaged - Spark plug need to be replaced.
Clogged or defective fuel pump - Check fuel pump and replace if necessary.
Valve clearance is incorrect - Adjustment procedure required.
Incorrect ignition timing - Set the ignition timing correctly.
Improperly adjusted low idle speed - Test and adjust.
| Engine starts but stalls immediately |
Defective spark plug - Install new spark plug.
Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary.
Ignition coil is damaged - Change ignition coil as required.
Broken or bad valve springs - New valve springs need to be installed.
Valves sticking - Service the valves.
| Engine overheating |
Insufficient engine oil - Check oil level and add oil as required.
Engine overloaded - Reduce engine load.
Dirty fuel injectors - Test fuel injectors and service if necessary.
Incorrect ignition timing - Set the ignition timing correctly.
Incorrect valve setting - Valves needs to be adjusted properly.
Clogged radiator core or damaged radiator cap - Clean radiator or change cap.
Engine has a lack of coolant - Add coolant and check the components of cooling system.
Thermostat failure - Change thermostat.
Water pump malfunction - Install new water pump.
| Engine knocks or noises |
Stale or low octane fuel - Use correct gasoline.
Engine overloaded - Load reducing required.
Engine oil level is low - Fill up the oil to required level.
Low idle speed adjustment is incorrect - Correct the settings.
Fuel pump is clogged or faulty - Check fuel pump and change if required.
Crankshaft or main bearings failure - Need to install new components.
Valve clearance is not correct - Check and adjust.
Piston rings or cylinder bore are damaged - Change faulty components.
| Low engine power |
Dirty or damaged fuel injectors - Test fuel injectors and change if necessary.
Air filter is blocked - Replace or clean air filter.
Dirty or defective fuel pump - Service or change fuel pump.
Defective ignition system - Inspect ignition system and change failed components.
Cylinder head gasket is blown - Replace cylinder head gasket.
Stuck or burned valves - Replace or clean valves.
Faulty cylinder block components - Defective components need to be replaced.
Dirty oil filter element - Change or service oil filter.
| Engine using too much gasoline |
Dirty air filter element - Clean or replace air filter.
Fuel injectors are clogged or faulty - Test fuel injectors and change if necessary.
Spark plug is loose or defective - Spark plug need to be tightened or replaced.
Ignition timing is improper - Set the ignition timing properly.
Valves are stuck, burned, or worn - Replace or service valves.
Sleeve, rings, or piston are damaged - Replace faulty parts as required.
Valve clearance is improper - Adjustment procedure required.
Low engine compression - Inspect cylinder block and change defective components.
| High oil consumption |
Damaged gaskets or seals - Replace defective parts.
Damaged valve guides or valve stems - Replace the valves.
Damaged or seized piston rings - Replace piston rings.
Cylinder liner or piston is scored - Inspect piston and liner, fit new components as necessary.
| Engine backfires |
Fuel injectors are dirty - Check fuel injectors and clean if necessary.
Restricted fuel lines - Service fuel lines.
Ignition timing is wrong - Ignition timing needs to be set properly.
Wrong valve setting - Valves needs to be set correctly.
Dirty air filter element - Replace or service air filter.
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