詭異的怠速不穩問題?

我的車是Ford 2005年的 activa 1.6,目前有一個怠速不穩的異常事件,就是天氣變冷(室外溫度20度以下),我的車就開始怠速不穩,轉速在600~1200之間來回晃動(不論冷車或熱車,也不論是否有冷氣,都會),空氣濾網處會發出啵、啵聲。

怠速馬達跟空氣流量計都換過,無改善。但只要室外溫度提高就恢復正常,所以我的表徵就是,每年到冬天,我的車就怠速不穩,春天以後就正常,修車廠都抓不到問題點,老闆研判可能是某個地方漏氣,但找不到。我也覺得很奇怪,把車開到太陽底下就正常,陰涼的地方就不穩,這都是熱車之後做的測試,冷車也一樣,在太陽底下啟動就正常。所以我才懷疑跟吸入空氣的溫度有關,但具體問題在哪? 還請各位大大指點迷津.....P.S. 動力完全沒影響。

1 個解答

評分
  • Gary
    Lv 7
    2 月 前

    It does not sound like a hardware issue (if it is a hardware issue, your car should have the same problem regardless of the outside temperature).

    I will suggest using a thinner motor oil first (i.e. lower velocity, such as - 10w30/40 > 5w30/40). Motor oil with low velocity is design to use for winters. Your owner manual should be able to tell you which one you need.

    Also - depending on the age, try spark plug as well.

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