My old Chevy Sail washed the accelerator by himself, and it was unstable and wobbly after idling.

In the repair shop, the throttle valve was cleaned, the spark plug was cleaned, the gasoline filter element was changed and the oxygen sensor was cleaned. However, your car burning warning light will continue to light up. This is because you only clean a small part of the oil circuit.

The cleanliness of the whole oil circuit is the most important. If you use a bottle of fuel additive, you will find it different;