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| Home / Car Engines / Toyota Engines / Toyota 1G-FE |
Toyota 1G-FE Troubleshooting
| Engine starts up hard or doesn't start |
Empty fuel tank - Add fuel.
Improper fuel grade - Change gasoline.
Air in fuel system - Bleed fuel system.
Defective spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Spark plug is defective - Spark plug need to be replaced.
Ignition failure - Inspect ignition system and change failed components.
Dirty fuel filter - Install new filter.
Fuel lines are dirty - Clean fuel lines.
Clogged or damaged fuel pump - Test fuel pump and change if necessary.
Fuel injectors are damaged or dirty - Test fuel injectors and replace if necessary.
Poor compression - Inspect and replace wear parts.
| Engine runs irregularly |
Defective ignition system - Inspect ignition system and change failed components.
Air filter is blocked - Service or change air filter.
Spark plug is damaged - Change spark plug as required.
Fuel pump is faulty or clogged - Test fuel pump and change if necessary.
Excessive valve clearance - Adjust valve clearance.
Incorrect ignition timing - Adjust ignition timing correctly.
Low idle speed set incorrectly - Correct idle settings.
| Engine stalls after starting |
Defective spark plug - Install new spark plug.
Dirty or defective fuel injectors - Test fuel injectors and replace if necessary.
Faulty ignition coil - Install a new ignition coil.
Valve springs are broken or bad - Valve springs need to be changed.
Stuck valves - Service the valves.
| Engine overheating |
Engine oil level low - Need to add engine oil.
Engine overloaded - Load reducing is recommended.
Clogged fuel injectors - Service or change fuel injectors.
Ignition timing is improper - Set the ignition timing correctly.
Wrong valve setting - Adjust valves as required.
Dirty radiator fins or faulty radiator cap - Replace cap or clean radiator.
Low coolant level - Add coolant fluid and inspect the cooling system for leaks.
Thermostat failure - Install new thermostat.
Water pump malfunction - Change water pump as required.
| Abnormal engine noise or knocking |
Low octane gasoline - Use proper gasoline.
Engine is running overloaded - Reduce load.
Insufficient engine oil - Check oil level and add oil as required.
Wrong adjustment of low idle speed - Adjust idle speed.
Fuel pump is clogged or faulty - Inspect fuel pump and change as required.
Crankshaft or main bearings wear - Crankshaft or bearings need to be replaced.
Valve clearance is not correct - Check and adjust.
Cylinder bore or piston rings are worn - Change defective components.
| Low engine power |
Clogged or defective fuel injectors - Check fuel injectors and change if required.
Air filter is blocked - Replace or clean air filter.
Fuel pump is damaged or dirty - Clean or install new fuel pump.
Ignition system failure - Check ignition system and replace faulty parts.
Blown cylinder head gasket - Install new cylinder head gasket.
Burned or stuck valves - Clean or replace valves.
Damaged cylinder block parts - Replace defective parts as required.
Dirty oil filter element - Replace or clean oil filter.
| Excessive fuel consumption |
Air filter element is plugged - Change or clean air filter.
Dirty or faulty fuel injectors - Check fuel injectors and replace if necessary.
Defective or loose spark plug - Change or re-tighten spark plug.
Ignition timing is improper - Ignition timing needs to be adjusted correctly.
Valves are worn, stuck, or burned - Clean or replace valves.
Worn piston, rings, or sleeve - Replace faulty parts.
Improper valve clearance - Check and adjust.
Poor compression - Inspect and replace wear parts.
| Engine oil consumption is too high |
Defective seals or gaskets - Defective components must be replaced.
Worn valve guides and valve stems - Valves need to be changed.
Stuck or worn piston rings - Have piston rings replaced.
Damaged piston or cylinder liner - Inspect piston and liner, fit new components as necessary.
| Engine backfires |
Fuel injectors are dirty - Test fuel injectors and service if necessary.
Restricted fuel lines - Fuel lines must be clean.
Incorrect ignition timing - Set the ignition timing properly.
Wrong valve setting - Set the valves properly.
Air filter element is plugged - Replace or clean air filter.
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