so i recently bought an evo 4 with evo 7 ecu with tephra v7 90550701. i trying to sort out 2 problems, my car never goes into closed loop and the wideband does not read correctly, this is what my eval is, 10.00+(16.99-10.00)*x/255.

also i would like to start with an evo 8 timing map, as im getting strange knock on part throttle low load
any help would be appreciated

 

wideband? reading via evoscan?

why never going into closed loop? coolant temp not met? post start o2 control parameters wrong?

 

evo scan is reading wideband but its off like 1 afr off.

about closed loop, i know the coolant temp is met, ill check o2 control parameters

 

You can modify the formula to meet the wideband!

Always on open loop could be the Tephra options, there is one to keep always on open loop, check that

 

im not seeing that option. but my o2 sensor voltage is around 0.133 and bearly moves. ill try another o2 sensor

 

Go to ecu Periphery0

allow closed loop, if it is not allowed (0) then you are set always on open loop

 

if you have front o2 heater turned off in periphery trims wont update , as the 4 doesnt use a 4 wire o2 so they turn it off in the periphery bit 14 faa , id usually wire in a 4 wire o2 sensor , for heater wires 12v to one wire (you can use the same wire as radio suppesor usually bolted to cam cover) and other heater wire goes to pin 60 , dont try enable open loop method its a disaster