What is the reason for Toyota Camry jitter?

What is the reason for Toyota Camry's jitter: 1, the engine has serious carbon deposition: the most common reason for car jitter is that the throttle is too dirty or the nozzle has too much carbon deposition. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by the carbon deposit during the cold start, which leads to the lean mixture during the cold start and makes it difficult to start. In this case, only when the gasoline adsorbed by carbon deposits is saturated can it easily enter the car, and the gasoline adsorbed on carbon deposits will be sucked into the cylinder by the vacuum suction of the engine to burn and make the mixture rich, thus causing idling jitter after cold start. 2. Ignition system problems: Check the working conditions of spark plugs, high-voltage lines and ignition coils. Poor ignition system and poor spark plug misfire can also lead to such failures. The solution is to check whether there is too much carbon in the spark plug and replace the spark plug. 3. Unstable oil pressure: If you have cleaned the engine carbon deposit, washed the throttle, changed the oil pad and spark plug, etc. , and still find the body shaking at idle speed, I suggest you go to the 4S shop to check whether the fuel supply pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal, or the intake pressure sensor has incorrect value and works badly, the body will shake. The solution is to check the oil pressure and replace the parts if necessary. 4. Aging of engine parts: Vehicle jitter is also related to the aging of engine feet. The engine foot is actually the damping system of the engine. The engine foot is responsible for absorbing the slight vibration when the engine is running. If there is something wrong with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing idling jitter.