I read somewhere in one of the forums that you can hook the blue wire from the safc to the vf and read voltage on the screen. I was wondering is this true. I also was wondering can I hook my safc 1 up without a wideband and set all the settings to zero until I get my wideband. I bought it off of ebay just curious if it works. My car is a 89 supra turbo, 7m-gte engine.