What's wrong with the old Sylphy?

Hello, your reasons may be as follows:

1. The battery voltage is too low or the starter is faulty.

2. Engine ignition failure, check the ignition energy of spark plug and ignition coil!

3. The fuel injection quantity is out of control and the mixture is out of balance. Check whether the oil pump pressure is normal and whether the oil nozzle is blocked!

4. Mechanical failure, chaotic engine timing and low cylinder pressure. Check cylinder pressure and timing!

Please check whether the above situation is normal. I'm happy to answer your question. I hope I can help you. Have a nice trip! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.