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| Home / Car Engines / Toyota Engines / Toyota 2JZ-GE |
Toyota 2JZ-GE Troubleshooting
| Engine starts up hard or won't start |
Gas tank is empty - Fill gasoline up.
Wrong grade of gasoline - Use quality gasoline.
Dirty fuel system - Check and clean.
Spark plug wiring connection is damaged - Check the spark plug wire connection, repair or replace.
Spark plug is damaged - Spark plug need to be replaced.
Defective ignition - Inspect ignition system and change failed components.
Fuel filter is clogged - Change fuel filter.
Clogged fuel lines - Service fuel lines.
Dirty or faulty fuel pump - Inspect fuel pump and change as required.
Dirty or defective fuel injectors - Clean or install new fuel injectors.
Bad compression - Check and change damaged parts.
| Unstable engine running |
Ignition system failure - Check ignition and replace faulty components.
Dirty air filter element - Service or replace air filter.
Defective spark plug - Install new spark plug.
Dirty or faulty fuel pump - Clean or replace fuel pump.
Incorrect valve clearance - Check and adjust.
Ignition timing is wrong - Set the ignition timing correctly.
Incorrect low idle setting - Adjustment required.
| Engine stops after starting |
Damaged spark plug - Install new spark plug.
Clogged or damaged fuel injectors - Check fuel injectors and replace if necessary.
Defective ignition coil - Install a new ignition coil.
Loose or worn valve springs - New valve springs need to be installed.
Stuck valves - Service the valves.
| Engine overheating |
Engine oil level is insufficient - Fill up the engine oil.
Engine is running overloaded - Reduce the load.
Clogged fuel injectors - Service or change fuel injectors.
Improper ignition timing - Ignition timing needs to be set properly.
Valve setting is wrong - Set the valves properly.
Defective radiator cap or clogged radiator core - Clean radiator or replace cap.
Insufficient coolant - Refill to the correct level and inspect system for leaks.
Thermostat failure - Change thermostat.
Water pump malfunction - Replace water pump.
| Engine knocking or noise |
Stale gasoline - Change gasoline.
Engine is running overloaded - Reduce engine load.
Engine oil level is low - Fill the crankcase with engine oil.
Low idle speed set incorrectly - Adjust idling as required.
Fuel pump is damaged or dirty - Test fuel pump and replace if necessary.
Crankshaft or main bearings are worn out - Worn parts replacement required.
Valve clearance is wrong - Adjustment procedure required.
Cylinder bore or piston rings are damaged - Change defective parts.
| Engine power loss |
Clogged or defective fuel injectors - Clean or replace fuel injectors.
Clogged air filter - Service or change air filter.
Fuel pump is faulty or clogged - Test fuel pump and change if necessary.
Ignition system malfunction - Test ignition and replace failed parts.
Worn cylinder head gasket - Install new head gasket.
Valves are burned or stuck - Replace or service valves.
Cylinder block components are faulty - Change defective parts.
Dirty oil filter element - Replace or service oil filter.
| High fuel consumption |
Air filter is blocked - Service or change air filter.
Clogged or damaged fuel injectors - Clean or install new fuel injectors.
Faulty or loose spark plug - Tighten or change the spark plug.
Ignition timing is wrong - Set the ignition timing correctly.
Stuck, worn, or burned valves - Change or service valves.
Sleeve, piston, or rings are damaged - Change faulty parts.
Incorrect valve clearance - Check and adjust.
Bad compression - Check and change damaged parts.
| Engine using too much oil |
Seals or gaskets are defective - Defective components must be replaced.
Valve stems and guides are worn - Replace defective valves.
Piston rings are defective or worn - Change piston rings.
Worn piston or cylinder liner - Inspect liner and piston, replace as necessary.
| Engine backfires |
Clogged fuel injectors - Service or change fuel injectors.
Fuel lines are dirty - Fuel lines need to be cleaned.
Ignition timing is wrong - Adjust ignition timing correctly.
Wrong valve setting - Valves needs to be set correctly.
Clogged air filter - Replace or service air filter.
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