MSefi.com read only forum (Jan.15,2018)

I have an ’88 Mustang with a 2.3 turbo, MS II, the EEC-IV adapter box and a PLX Devices wideband controller and gauge. The problem is that the PLX gauge reads ½ an AFR point higher than the gauge in Megatune. The gauge and controller get both power and grounds from the adapter box and I’ve ...