What is the reason why the ignition sign 307 does not inject fuel and does not ignite?

1. There is too much carbon deposit inside the engine, and the gasoline sprayed by the fuel injection head will be absorbed by the carbon deposit during cold start, which will lead to too thin mixture during cold start, making it difficult to start, and it will be easy to crash until the gasoline absorbed by the carbon deposit is saturated.

2, check the air grille, damper, etc. Too much carbon deposition in the throttle will also cause difficulty in starting and idling jitter.

3. Check the spark plug again.

4. Check whether there is any vacuum tube falling off or leaking.

5. Check the electrical system. Check the ignition coil and ignition timing.

6. Check the fuel pump, focusing on whether the injection pressure is normal and whether the pressure of the EFI system can be maintained after flameout.