12 Volkswagen sagitar 18.t high idle speed

Sagitar idle speed will rise after a while, and it will drop to normal after stepping on the accelerator for 2000 rpm. This is caused by a typical dirty throttle, because once the carbon deposit in the engine increases, the error of the throttle will increase, causing the computer inside the engine to issue wrong instructions, which will lead to an increase in engine speed. We just need to step on the accelerator to get back to normal, because the accelerator can make the error of the accelerator smaller.

The sudden increase may be caused by the failure of the vehicle throttle. Too dirty throttle will lead to the error of throttle opening, the sensitivity of throttle will be reduced, and the throttle may not be closed normally at idle speed, resulting in a sudden increase or even more than 3000 rpm.