Just installed an Apexi timer in airtrek-r. How do I intepret the A/F & O2 readings? When I start the car, the A/F reads 19.9-20.0 (the instructions say that an ideal reading is about 14.5 - 15 according to graph).

Can anyone enlighten me?

 

I don't think that stuff is accurate at all...I don't even bother using mine.

 

yea it's not accurate. It runs off the stock o2 signal. 0-1 volt Get a wide band o2 sensor if you want to read you A/F 0-5 volts

 

Moving to How Tos!!
Thanks!!

 

Oh ok...what would a 'normal' a/f reading be then?