What is the reason why the Audi Q5 cold car will shake at the start?

There are many reasons for the start-up jitter of automobile cold car:

The spark plug is in poor working condition.

The high-voltage line was punctured and a fire broke out.

Poor contact of distributor.

The fuel nozzle is blocked and the fuel atomization is not good.

There is carbon deposit in the combustion chamber, which leads to valve sticking.

Low temperature leads to oil condensation, low fluidity and poor lubrication, and the jitter disappears when the temperature rises.

The above are the main causes of vibration, and the damage of engine rubber pier will also cause body vibration.

Possible cause analysis: 1, the program matching of the driving computer is not enough during cold start, so it can be ruled out by turning off the engine and pulling out the key. 2, often flameout, or engine oil problems, the throttle is dirty, cleaning the throttle can disappear; Solution: 1, to remind everyone, whether it's a cold start or a pause before starting, it's usually after a few minutes of power failure, every start should be powered on for 3-5 seconds, let the fuel pump supply oil first, let the fuel pump pressure go up, and let all sensors have signals before igniting 2. If parking exceeds 1 hour, it is best to leave without starting and start the car in place. Especially after driving at a high speed, suddenly enter the service area, do not turn off the engine immediately. Open the door and let everyone get off first, and turn off the headlights at night. Then, after checking the internal equipment of the vehicle, such as closing the glass, turning off the lights, that is, the vehicle is idling 10-30 seconds, and then turning off the engine 4. You'll be fine after the self-inspection, but after the ignition, the engine and gearbox are not properly lubricated, and there will still be wear and tear when you leave.