What's wrong with the car ignition, but it can be lit?

The aging of automobile spark plug, automobile throttle and automobile battery may lead to poor ignition. For gasoline vehicles, after removing the air grille to check that there is no blockage, check the spark plug, high-voltage line, high-voltage bag and fuel injector. Poor ignition or poor fuel injection will cause poor refueling.

It is directly related to the inspection of engine ignition system and the working condition of EFI system. Also check whether the ignition is normal, throttle position sensor, air flowmeter or manifold pressure sensor, etc. Finally, check whether the cylinder pressure is too low and whether the exhaust system is blocked.

If these are all right, it is necessary to check the working condition of the gasoline pump. Insufficient oil supply is also a very important reason, and dirty gasoline grids can also cause insufficient oil supply. If it doesn't work, remove the throttle for inspection and cleaning, and check the air intake system and sensor.

If it is a diesel vehicle, check the air cabin first, and then check the oil circuit and diesel cabin. Make sure there is no problem, and then look at the ignition advance angle. If there is no problem, take apart the nozzle and put it on the test bench for inspection. If the nozzle is normal, the oil pump needs to be calibrated.