14.7 is the optimal air fuel mass ratio for the best and most complete burn of a fuel oxygen mixture in an internal combustion engine. Might not be a perfect definition but i know what it is...

WHAT I MEANT was, I don't see why this would be needed at all. Its not running an o2 sensor, so it can't possibly know what the AFR is in the first place. My guess is that i can't run the required fuel calculator, which is ok with me and last i checked it didn't need the required fuel calcualtor to run. My question ultimately is...If i don't have an o2 does the MSNS just run the maps?If not do i need an o2 to run can i use the narrow band until i get a wideband for the MSNS

I bought the HARNESS from DIY. I didn't specify were i got the ecu, BTW i got it from a 2gnt member and YES it is for a 420a and YES it does have the proper software and YES everything is wired/conneted right. I'm asking for help with the settings in megatune to get the car running. Most importantly the cranking setting and such. Dang.

Also, i DO have cranking RPMS. I Said all sensor work correctly! The wiring was no challenge at all. I get pulse width, i just don't know much about its application. AND yes i'm only running fuel right now. I just have it all wired in forafter i get fuel going i can start messing with spark. Its all setup so i can switch back and forth between stock and any part of the MSNS quickly. I'm not stranded or anything. Jezz guys. Stop reading into this.

FIANLLY, i will have a wideband when i take it to get tuned. I just need the car to start and idle on its own power so it can be taken to a dyno and tuned. Don't worry about anything i don't ask for help on. Please.

95 RS sold...