汽車廢氣超標

廢氣超標?改了.加裝什麼?
what model year? co or lambda (空燃比) which one, Gasoilne or Diesel engine?
standard PC (gasoline)
1976 year-1981 co% less than 4.5%
1982 year-1991 co% less than 3.5%
1992 year-now co% less than 0.5% idle speed, over 2000 rpm less than 0.3% and lambda should be 0.97-1.03 range.

Diesel 60HSU or 2.13 km-1

如果是汽油引擎的話,有幾個可能性:
1.燃燒不良,例如火咀老化或火位不對
2.空燃比過濃
3.引擎遮軨磨蝕引至燒機油
4.催化轉換器老化或失效
建議搵一些有co檢測機儀的大車房跟進.

可能係 1). 汽油與生風比例唔對. 2). 活塞環破損,燒偈油. 3). 死氣喉老舊.
而廢氣超標,柴油車會比汽油車嚴重,是燃料上的問題. 可以到代理或各大車房驗查及維修,要幾多錢就答唔到你啦,睇你要修邊部份. 希望會幫到你!