Wing God, the problem of unstable idle speed is high and low.

At present, it is known that the 2.0 intake manifold adopts 1.8 intake manifold, and the size difference between the intake manifold and the outer diameter is 1cm. Did you check the opening and closing action of the throttle? That is to say, is the state of the half-open throttle unstable ~ there is no problem with full opening and full closing. The rest is the problem of semi-open and semi-closed steady state. 1 Mechanical failure The throttle is aging and the pressure of the half-open spring is unstable. 2 mainly manifested as telex signal error.