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Toyota 22R Troubleshooting

Engine Model: Toyota 22R
Engine Type: 4-cycle 4-cylinder 8-valve SOHC gasoline engine
Total Displacement: 144.4 (2.37 L)
Rated Engine Power: 110 Hp (81 kW) at 5000 rpm
Fuel System: Two barrel carburetor


Engine will not start or difficult to start

Empty gas tank - Fill gasoline up.
Low-quality gasoline - Use quality fuel.
There is air in the fuel system - Bleed the system.
Spark plug wire is disconnected or loose - Inspect the spark plug wire connection, replace or repair.
Spark plug is faulty - Install new spark plug.
Defective ignition system - Inspect ignition system and change failed components.
Dirty fuel filter - Replace fuel filter.
Fuel lines are dirty - Clean fuel system lines.
Dirty or damaged fuel pump - Inspect fuel pump and change as required.
Carburetor is not working properly - Inspect and adjust.
Poor cylinder compression - Check cylinder block and change worn parts.

Engine runs roughly

Defective ignition - Inspect ignition system and change failed components.
Air filter element is plugged - Service or replace air filter.
Damaged spark plug - Replace spark plug.
Dirty or faulty fuel pump - Clean or replace fuel pump.
Valve clearance is not correct - Adjust to proper valve clearance.
Ignition timing is wrong - Ignition timing needs to be set properly.
Low idle speed setting is incorrect - Adjust as required.

Engine starts but stalls immediately

Spark plug is damaged - Change spark plug.
Dirty or defective carburetor - Carburetor needs to be replaced or cleaned.
Defective ignition coil - Replace ignition coil as necessary.
Loose or worn valve springs - Install new valve springs.
Valves sticking - Service the valves.

Engine overheats

Lack of engine oil - Fill up the oil to required level.
Engine is overloaded - Reduce load.
Carburetor mixture is too lean - Use proper settings.
Wrong ignition timing - Adjust ignition timing correctly.
Incorrect valve setting - Set the valves properly.
Clogged radiator fins or leaking radiator cap - Clean radiator or change cap.
Coolant level is low - Fill radiator to proper level and check components for faults.
Thermostat is defective - Thermostat need to be replaced.
Defective water pump - Install new water pump.

Abnormal engine knocking or noise

Stale gasoline - Change gasoline.
Engine is overloaded - Load reducing is recommended.
Insufficient engine oil - Fill up the oil to required level.
Wrong adjustment of low idle speed - Correct the settings.
Fuel pump is clogged or faulty - Service or replace fuel pump.
Crankshaft or main bearings are worn out - Crankshaft or bearings need to be replaced.
Valve clearance is wrong - Adjust to proper valve clearance.
Damaged piston rings or cylinder bore - Replace faulty parts.

Engine lacks power

Dirty or incorrectly adjusted carburetor - Service or properly adjust carburetor.
Air filter is dirty - Replace or service air filter.
Fuel pump is damaged or dirty - Service or change fuel pump.
Ignition failure - Inspect ignition system and change faulty parts.
Cylinder head gasket is damaged - Cylinder-head gasket replacement required.
Valves are burned or stuck - Replace or clean valves.
Cylinder block components are faulty - Replace defective components.
Oil filter is dirty - Service or replace oil filter.

Engine using too much gasoline

Clogged air filter - Replace or service air filter.
Incorrect carburetor main jet adjustment - Adjust it properly.
Spark plug is loose or faulty - Change or re-tighten spark plug.
Ignition timing is improper - Ignition timing needs to be adjusted correctly.
Valves are worn, stuck, or burned - Service or replace valves.
Sleeve, rings, or piston are damaged - Replace faulty components.
Valve clearance is incorrect - Adjust valve clearance.
Bad compression - Check and change damaged parts.

High engine oil consumption

Damaged gaskets or seals - Install new components.
Valve stems and guides are worn - Valves need to be changed.
Stuck or worn piston rings - Change piston rings.
Damaged piston or cylinder liner - Inspect liner and piston, replace as necessary.

Engine backfires

Carburetor mixture is too lean - Adjust carburetor correctly.
Dirt in the fuel lines - Service fuel lines.
Ignition timing is improper - Adjust ignition timing correctly.
Incorrect valve setting - Set the valves correctly.
Plugged air filter - Clean or replace air filter.