What is the reason for Toyota Xiaofuxing's slow response to refueling in 2003?

Because the ignition system is not good, the ignition is not accurate, and the voltage output is unstable, which leads to unstable ignition.

You can clean or replace the spark plug according to the situation. It may be caused by excessive carbon deposition in the intake system or recent blockage. You can clean the throttle. It may also be caused by fuel injection failure, such as clogged fuel injector or damaged fuel injector. You can go to the repair shop to clean the fuel injector.