Open or Closed Loop

K20EG · Post by **K20EG** » Tue Jul 26, 2005 3:35 pm

For NA K20A2...which mode is safer to run as a daily driven car (open or closed loop)?

Post by **Spunkster** » Tue Jul 26, 2005 4:18 pm

closed loop is best.

K20EG · Post by **K20EG** » Tue Jul 26, 2005 4:40 pm

Will the primary O2 sensor be utilized at all under closed loop, because my O2 sensor is messed up. The AF is reading 28:1 under open loop and 38:1 under closed loop. If I run closed loop it wouldn't matter what the AF is reading right?

tryfe · Post by **tryfe** » Tue Jul 26, 2005 7:59 pm

K20EG wrote:Will the primary O2 sensor be utilized at all under closed loop, because my O2 sensor is messed up. The AF is reading 28:1 under open loop and 38:1 under closed loop. If I run closed loop it wouldn't matter what the AF is reading right?

Closed Loop's whole principle is utilizing the primary o2 sensor in achieving a constant 14.7 a/f ratio.