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| Home / Car Engines / Toyota Engines / Toyota 2T-G |
Toyota 2T-G Troubleshooting
| Engine hard starting or not starting |
Empty gas tank - Fill fuel up.
Wrong fuel grade - Use correct fuel grade.
There is air in the fuel system - Bleed the system.
Spark plug wiring connection is damaged - Inspect the spark plug wire connection, replace or repair.
Spark plug is damaged - Change spark plug.
Ignition system malfunction - Check ignition and replace faulty components.
Fuel filter is plugged - Fuel filter needs changing.
Fuel lines are clogged - Service fuel lines.
Dirty or faulty fuel pump - Clean or install new fuel pump.
Carburetor not adjusted - Adjust according to instructions.
Low engine compression - Inspect cylinder block and change defective components.
| Engine runs intermittently |
Defective ignition - Check ignition and replace faulty components.
Clogged air filter - Replace or clean filter.
Spark plug is defective - Change spark plug as required.
Fuel pump is faulty or clogged - Clean or install new fuel pump.
Valve clearance is improper - Adjust valve clearance.
Ignition timing is improper - Set the ignition timing correctly.
Too low idle RPM - Adjust idling as required.
| Engine starts and stalls immediately |
Faulty spark plug - Change spark plug.
Clogged or faulty carburetor - Clean or install new carburetor.
Faulty ignition coil - Ignition coil must be replaced.
Bad or damaged valve springs - Install new valve springs.
Stuck valves - Clean the valves.
| Engine is overheated |
Insufficient engine oil - Check and refill engine oil.
Engine overload - Reduce engine load.
Too lean carburetor mixture - Set the carburetor correctly.
Bad ignition timing - Adjust ignition timing correctly.
Valve setting is incorrect - Valves needs to be set correctly.
Dirty radiator core or defective radiator cap - Clean radiator or replace cap.
Insufficient coolant - Top up coolant fluid and check system for leaks.
Thermostat is defective - Replace thermostat.
Water pump malfunction - Install new water pump.
| Abnormal engine knocking or noise |
Low octane fuel - Use proper fuel.
Engine is under excessive load - Load reducing required.
Low engine oil level - Checking oil level and add if necessary.
Incorrectly set low idle speed - Need to adjust idle speed.
Dirty or faulty fuel pump - Inspect fuel pump and change as required.
Crankshaft or main bearings wear - Crankshaft or bearings need to be replaced.
Improper valve clearance - Adjust to proper valve clearance.
Piston rings or cylinder bore are worn - Change defective parts.
| Engine power is insufficient |
Carburetor is incorrectly adjusted or dirty - Adjust the carburetor properly or clean it.
Air filter element is clogged - Service or replace air filter.
Clogged or defective fuel pump - Check fuel pump and change if required.
Ignition failure - Check ignition system and replace faulty parts.
Cylinder head gasket is damaged - Install new cylinder head gasket.
Burned or stuck valves - Change or clean valves.
Cylinder block components are worn - Defective components need to be replaced.
Oil filter element is clogged - Replace or service oil filter.
| Engine using too much gasoline |
Clogged air filter - Change or service air filter.
Improper adjustment of carburetor main jet - Adjust the carburetor main jet correctly.
Spark plug is loose or defective - Re-tighten or replace spark plug.
Wrong ignition timing - Set the ignition timing properly.
Valves are worn, stuck, or burned - Clean or replace valves.
Worn sleeve, rings, or piston - Replace defective components as required.
Excessive valve clearance - Adjust valve clearance according to specifications.
Low engine compression - Inspect cylinder block and change defective components.
| Engine using too much oil |
Seals or gaskets are defective - Install new components.
Valve guides or stems are damaged - Replace the valves.
Piston rings are seized or worn - Piston rings replacement required.
Worn piston or cylinder liner - Check liner and piston, change as required.
| Engine backfires |
Carburetor mixture is too lean - Adjust carburetor correctly.
Clogged fuel lines - Fuel lines need to be cleaned.
Improper ignition timing - Set the ignition timing properly.
Improper valve setting - Valves needs to be set correctly.
Clogged air filter - Replace or service air filter.
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