What is the reason for the poor acceleration of the Corolla 1 8 in 04?

1. The reason why the car has a sense of powerlessness is mainly because the engine does not have enough oil when going uphill, and the combustion efficiency decreases and the horsepower.

It also falls short of our requirements.

2. In addition to oil, the engine also needs air, if the air filter.

The throttle and other components are clogged or have problems, resulting in insufficient air intake, which will also cause the car to accelerate inability and slow acceleration.

3. If the spark plug.

Poor ignition may lead to weak acceleration. 4. If the car is sluggish, and the car will feel the steering wheel or body shake significantly when it stops, then it means that at least one cylinder of the car's engine is running abnormally or stalling.

5. Exhaust system failure, exhaust system failure mainly refers to poor exhaust, which is generally due to three-way catalysis.

If the exhaust pipe is clogged due to crushing, the engine power will be reduced.

Poor acceleration and oil supply are mainly caused by the following aspects. a. The air valve and steam valve of the fuel tank cap are blocked; b. The gasoline filter is blocked; c. Gasoline pump damage: 1

Inlet and outlet valves fail, 2Diaphragm rupture, 3The gap between the outer and inner rocker arms is too large; d. There is air leakage and oil leakage in the oil circuit system, and the oil pipe is concave or blocked; e. There is water in the tubing; f. Air resistance; g. The carburetor inlet or filter screen is blocked.

Summary. Hello 10 years Toyota Corolla, the reason for the high idle speed is throttle failure, sensor failure Oh.

Because when the idle valve fails, the number of idle rotations cannot be adjusted correctly, resulting in unstable idle speed and difficulty in starting the cold door, and in serious cases, the idle speed will disappear and the engine will turn off when the accelerator is released. 2. If the throttle fails, the opening of the throttle will produce an error, the sensitivity of the throttle will decrease, and the idle may not be closed in place, which may cause abnormal idling.

10 year Toyota Corolla with high idle speed.

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Hello. Hello 10 years Toyota Huachang Burning Crown, the reason for the high idle speed is throttle failure, sensor failure Oh, because when the idle resistance digging virtual speed valve fails, the number of idle rotations can not be adjusted correctly, resulting in unstable idle speed, difficult to start unpopularly, and when it is serious, the idle speed will disappear and the accelerator will be turned off. 2. If the throttle dispersion valve fails, the opening of the throttle valve will be incorrect, the sensitivity of the throttle will decrease, and the idle speed may not be closed in place, which may cause abnormal idling.

See if there are any other questions you need me to answer for you?

I washed the throttle, and that's it after washing.

Can I use a computer to do the matching?

Hello, you can use the computer to match and check the throttle sensor.

He is electronic.

That's right, the electronic throttle.

What else could affect his idling?

Hello, about the throttle cleaning and sensor anomalies oh.

If the time can be matched, its idle speed is still high, it is the throttle.

Hello, wait a minute.

After checking the throttle sensor and cleaning the throttle, the idle speed is relatively stable.

Hello, glad to answer for you :

**The Corolla is full of electronic throttle valves, and the normal idle speed range is between 600 and 800, which is more than this range (high or low).

It shows that your throttle is dirty and needs to be cleaned (it is recommended to go to the 4S shop) The old Corolla with throttle cable can adjust the idle speed, but the adjustment idle speed range is still between 600-800, not high or low.