| Quantity: | |
|---|---|
I. Insufficient power
(I) Fault phenomenon
The vehicle obviously feels slow power when accelerating, the climbing ability decreases, it is difficult to reach the expected speed when driving at high speed, and the driving experience is obviously worse.
(II) Cause analysis
Intake system blockage: The air filter has not been replaced for a long time, and a large amount of dust and impurities are accumulated, resulting in a decrease in the amount of air entering the engine, so that the fuel cannot be fully burned.
Fuel system problem: The fuel filter is blocked, which hinders the normal delivery of fuel; the fuel injector has serious carbon deposits, resulting in poor fuel injection atomization, affecting the mixing ratio of fuel and air.
Ignition system failure: The spark plug is excessively worn, the ignition energy is insufficient, and the mixture cannot be ignited in time; the ignition coil is aged, and the high voltage generated is unstable, resulting in an incomplete combustion process.
Poor exhaust system: The three-way catalytic converter is blocked, the exhaust gas cannot be discharged smoothly, which increases the exhaust back pressure, affects the engine's intake efficiency, and thus reduces power output.
(III) Solution
Check the intake system: replace the air filter regularly, usually every 10,000-15,000 kilometers; check whether the intake pipe is damaged or leaking, and repair or replace the damaged parts in time.
Maintain the fuel system: replace the fuel filter according to the specified mileage, and it is recommended to replace it every 30,000-40,000 kilometers; use fuel additives to clean the injectors. If the carbon deposits are serious, the injectors need to be removed for professional cleaning; check the working pressure of the fuel pump to ensure that the fuel can be supplied normally.
Inspect the ignition system: check the spark plug condition regularly. When the electrode is worn or there is too much carbon deposit, replace the spark plug in time. The replacement cycle is usually 30,000-50,000 kilometers; detect the output voltage of the ignition coil. If the voltage is abnormal, the ignition coil needs to be replaced.
Clean the exhaust system: use a special three-way catalytic converter cleaning agent to clean it. If the blockage is serious, replace a new three-way catalytic converter; at the same time, check whether the exhaust pipe is deformed or blocked, and repair or dredge it in time.
4.5L Engine Motor 102k 4961
95-97 Land Cruiser Lexus LX450 1FZ-FE FZJ80
I. Insufficient power
(I) Fault phenomenon
The vehicle obviously feels slow power when accelerating, the climbing ability decreases, it is difficult to reach the expected speed when driving at high speed, and the driving experience is obviously worse.
(II) Cause analysis
Intake system blockage: The air filter has not been replaced for a long time, and a large amount of dust and impurities are accumulated, resulting in a decrease in the amount of air entering the engine, so that the fuel cannot be fully burned.
Fuel system problem: The fuel filter is blocked, which hinders the normal delivery of fuel; the fuel injector has serious carbon deposits, resulting in poor fuel injection atomization, affecting the mixing ratio of fuel and air.
Ignition system failure: The spark plug is excessively worn, the ignition energy is insufficient, and the mixture cannot be ignited in time; the ignition coil is aged, and the high voltage generated is unstable, resulting in an incomplete combustion process.
Poor exhaust system: The three-way catalytic converter is blocked, the exhaust gas cannot be discharged smoothly, which increases the exhaust back pressure, affects the engine's intake efficiency, and thus reduces power output.
(III) Solution
Check the intake system: replace the air filter regularly, usually every 10,000-15,000 kilometers; check whether the intake pipe is damaged or leaking, and repair or replace the damaged parts in time.
Maintain the fuel system: replace the fuel filter according to the specified mileage, and it is recommended to replace it every 30,000-40,000 kilometers; use fuel additives to clean the injectors. If the carbon deposits are serious, the injectors need to be removed for professional cleaning; check the working pressure of the fuel pump to ensure that the fuel can be supplied normally.
Inspect the ignition system: check the spark plug condition regularly. When the electrode is worn or there is too much carbon deposit, replace the spark plug in time. The replacement cycle is usually 30,000-50,000 kilometers; detect the output voltage of the ignition coil. If the voltage is abnormal, the ignition coil needs to be replaced.
Clean the exhaust system: use a special three-way catalytic converter cleaning agent to clean it. If the blockage is serious, replace a new three-way catalytic converter; at the same time, check whether the exhaust pipe is deformed or blocked, and repair or dredge it in time.
4.5L Engine Motor 102k 4961
95-97 Land Cruiser Lexus LX450 1FZ-FE FZJ80
