Interpretation factors that cause cold start idling car jitter

 Start the car shaking is gasoline cars generally wrong. Chattering cold start or neutral waiting most fundamental reason is the bad cylinder combustion. Burning bad car power is not enough, car occurred jitter. For the image of an example, assume that the colt resorted to force of 100 points in order to pull the car, but if only resorted to force of 60 points, of course, will walk the occurrence of jitter.
    Relatively low ignition energy facing car cold start problem is the low temperature,
    Insufficient engine temperature, fuel and lubricating oil temperature is not enough, so should be more than the cold start injector to meet the power requirements of the greater the gap of the spark plugs, ignition energy is smaller. Poor fuel atomization in the low temperature, the fuel requires a higher ignition energy, the car is used for a long time, the ignition gap of the spark plug tends to be large, resulting in the ignition energy decreases, thus affecting the dynamic, so that the car jitter occurs.
    In addition, the aging ignition coil, the spark plug of the high-voltage lines to aging or leakage, can also lead to lower ignition energy.
    Mixing ratio inappropriate
    Oil and gas mixing ratio of the deployment are not allowed to exist in the open-loop and closed-loop control. In the closed-loop control of the car, the oxygen
    The minimum working temperature of the sensor is 370 degrees Celsius, if just start the car, because the exhaust pipe temperature of less than 370 degrees Celsius, so the oxygen sensor does not work. ECU determines mistakes, mixing of oil and gas through the implementing agencies, ignition timing control errors, thereby reducing the power output of the car, there chattering.
    Valve and inlet coke
    If the engine valve and inlet coke, carbon deposits can absorb the right amount of fuel (like water over its banks, the soil to be absorbent), the ECU judgment error.
    Actual computer control spray assume that 100 parts of the oil and gas, only 90 (10 parts carbon deposits absorption) but the actual into the cylinder, then mixed oil and gas even if the rest of the 90 full combustion, and also less than the power jitter phenomenon in the offing.
    Different conditions for each cylinder
    Similarly, the spark plug of the multi-cylinder machine will also have the above problems. After prolonged use, the ignition of the spark plug gap and time control will appear different, but the ECU can not diagnose this bias, is still on the "they" treat each other as equals, which appeared in the practical and theoretical error results some cylinder the power is small, will result in jitter.
    After prolonged use, the engine in each cylinder liner and the piston gap will also appear large or small differences, some gap is large, some small gap. In the cold start, and no good oil lubrication, the large gap cylinder easily leak from the gap out a certain high-temperature gas, thereby reducing the power output.
    Water temperature sensor failure
    If you have a fever, but the thermometer reading is normal, what would happen? The water temperature sensor is one of the important basis for the judgment of the engine condition computer. If the engine cold start temperature of minus 10 degrees Celsius, but the sensor "tells" computer "temperature is 20 degrees Celsius, then the computer will be 20 degrees Celsius conditions fuel injection, oil of course smaller jitter occurs of course, is a natural .
    Other factors
    Air flow meter is dirty, leading into the gas decreases; EGR (exhaust gas recirculation) valve work is not good, and the introduction of emission idle; idle speed motor control bypass inlet, in order to adjust the size of the intake air quantity, if the voltage is low The work may not in place; oil bad, to reach the corresponding thermal value, resulting in the power output of the combustion is too small. The above four factors that can lead to a cold start or neutral while waiting for the burning of a cylinder is not good, resulting in engine jitter.