Faw-Volkswagen sagitar sometimes fails to catch fire.

What do you mean there is no fire? Is it impossible to catch fire? If it is not on fire, please consider the following reasons:

1, dirty throttle, resulting in insufficient air intake; (Clean the throttle valve thoroughly)

2. The battery is dead, resulting in insufficient voltage and current to ignite the spark plug; (Connect to get some points or replace the battery in time)

3. The driving computer is out of order, so it is impossible to strike a light due to program restrictions; (You need to contact the staff of 4s shop as soon as possible to check the driving computer)