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Home / Car Engines / Toyota Engines / TOYOTA 5S-FE

Toyota 5S-FE Troubleshooting

Engine Model: Toyota 5S-FE

Engine Type: 4-cylinder 16-valve DOHC gasoline engine

Total Displacement: 132 cu.in (2.2 L)

Rated Engine Power: 132 Hp (97 kW) at 5400 rpm

Fuel System: Multi-point fuel injection (MPFI)

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Engine won't start or starts hard

Fuel tank is empty - Add gasoline.
Wrong fuel grade - Use quality gasoline.
Air in fuel system - Bleed fuel system.
Disconnected or loose spark plug wire - Inspect spark plug wiring connection, change or repair.
Spark plug is defective - Change spark plug as required.
Ignition system problems - Check ignition and replace faulty components.
Clogged fuel filter - Change fuel filter.
Fuel lines are clogged - Service fuel lines.
Fuel pump is faulty or clogged - Clean or replace fuel pump.
Fuel injectors are defective or dirty - Inspect fuel injectors and change as required.
Poor engine compression - Check cylinder block and replace damaged components.

Engine runs irregularly

Ignition system failure - Check ignition and replace faulty components.
Air filter element is plugged - Change or clean air filter.
Damaged spark plug - Change spark plug as required.
Fuel pump is faulty or clogged - Inspect fuel pump and change as required.
Valve clearance is wrong - Adjust valve clearance according to specifications.
Wrong ignition timing - Adjust ignition timing as required.
Incorrectly set low idle speed - Need to adjust idle speed.

Engine starts but then stalls

Faulty spark plug - Replace spark plug.
Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary.
Faulty ignition coil - Change ignition coil as required.
Valve springs are damaged or weak - Replace valve springs.
Stuck valves - Clean the valves.

Engine overheating

Insufficient engine oil - Fill the crankcase with engine oil.
Excessive engine load - Reduce the load.
Fuel injectors are clogged - Need to clean fuel injectors.
Bad ignition timing - Set the ignition timing correctly.
Incorrect valve setting - Adjust valves as required.
Clogged radiator fins or damaged radiator cap - Replace cap or clean radiator.
Lack of engine coolant - Add coolant and check the components of cooling system.
Thermostat is defective - Change thermostat as required.
Water pump is defective - Install new water pump.

Engine knocking or noise

Low octane fuel - Use correct gasoline.
Engine is under excessive load - Load reducing required.
Not enough engine oil - Fill the crankcase with engine oil.
Low idle speed set incorrectly - Correct idle settings.
Fuel pump is defective or dirty - Test fuel pump and change if necessary.
Crankshaft or main bearings failure - Repair or replace defective parts.
Excessive valve clearance - Need to adjust valve clearance.
Cylinder bore or piston rings are worn - Change defective components.

Engine lacks power

Dirty or faulty fuel injectors - Service or replace fuel injectors.
Air filter element is clogged - Clean or change air filter.
Dirty or damaged fuel pump - Test fuel pump and change if necessary.
Ignition system is defective - Check ignition and replace faulty components.
Cylinder head gasket is worn - Change cylinder head gasket.
Burned or stuck valves - Service or replace valves.
Cylinder block parts are damaged - Replace defective components as required.
Clogged oil filter - Change or service oil filter.

Excessive fuel consumption

Air filter is dirty - Clean or change air filter.
Fuel injectors are dirty or defective - Test fuel injectors and replace if necessary.
Spark plug is loose or faulty - Re-tighten or replace spark plug.
Improper ignition timing - Set the ignition timing correctly.
Worn, stuck, or burned valves - Replace or service valves.
Worn rings, piston, or sleeve - Replace faulty components as required.
Valve clearance is improper - Check and adjust.
Poor engine compression - Check cylinder block and replace damaged components.

Engine consuming too much oil

Defective seals or gaskets - New components need to be installed.
Damaged valve guides or valve stems - Change the valves.
Piston rings are stuck or worn - Change the piston rings as required.
Worn cylinder liner or piston - Inspect liner and piston, replace as necessary.

Engine backfires

Clogged fuel injectors - Inspect fuel injectors and service as required.
Fuel lines clogging - Fuel lines need to be cleaned.
Ignition timing is improper - Set the ignition timing correctly.
Incorrect valve setting - Set the valves properly.
Air filter is blocked - Replace or clean air filter.

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