I'm watching the display on my HKS A/F knock amp. Under boost the ratio seems to be a good 11.5. When idle it seems to be around 12.5-12.8 and about the same when cruising. Isn't that too rich? I just got the car tuned too so perhaps the gauge the sensor is bad? But it does state good A/F under boost.

 

With the same knock amp my idle is around 14-14.5. I would think 12 is too rich

 

way too rich at idle. you should be in the mid 14s.

 

^i concur

 

^ what they said

 

yeah, way too rich, at idle u should be at or around (stoic) 14.7 and at WOT 11.1 is the richest id run so 11.5 is good, and at cruise 14.7 - 15.5. Thats the A/F i ran when i had my DSM, so im not to familiar whit what these engines like to run yet but they seem less finicky that my ole 4G63. Also to test your WB sensor take it out turn the car on the gauge should lean all the way out then take a rag soak it in the fuel youre using wrap it around the sensor and turn the car on and it should read pig rich. Hope this helps.