The throttle is flooded.

Don't change the throttle in a hurry, it won't break or split in two. Check the air filter yourself first to see if the air filter is wet because of wading, which makes the throttle water. Start with a simple inspection, and don't blindly replace accessories easily.

It is suggested to check whether the waterproof of the throttle plug wiring harness and the computer plug wiring harness is damaged, whether water flows into the throttle along the wires, or make the throttle plug wiring harness U-shaped so that the throttle plug is higher than the lowest part of the plug wiring harness.