What should I do if the 99 Jetta doesn't match the throttle?

In order to better adjust the idle speed, control the fuel injection and adjust the shift point of the engine, the computer needs to input the state data of the throttle in real time. When the data changes, the computer will automatically adjust the throttle data value. If it exceeds a certain value, the engine will work abnormally. At this time, it is necessary to clean the throttle, write the latest state data of the throttle into the computer board, and let the computer board adjust the working mode according to the new data. It is necessary to use a dedicated or universal decoder for throttle matching, and clear the original data according to the decoder prompts to identify new data.

It is recommended to clean and maintain the throttle every 15000 km, and learn after each cleaning to make the engine reach the best working condition. Irregular throttle cleaning may lead to abnormal idle speed, slow gear shifting, weak acceleration and high fuel consumption.