I'm going to be removing a Motorcraft 2150 carburetor in a 2.8L V6 and swapping it for a Ford CFI (and ECU) from a 3.8L V6. I've just recently pulled everything (ECU, throttle body, sensors, harnesses, etc) from a Mercury Cougar.
When I was removing the CFI from the Cougar, I've noticed that the EEC-IV harness has two inputs for the heated O2 sensors (one in each manifold), but the 2.8L only has one O2 sensor (around the driver's side manifold).
Is there a way to connect both O2 sensor inputs to a single O2 sensor? Or do I need to take off the other manifold and tap a hole into it?
If I can connect both inputs to a single sensor, would it make any difference in the performance of it? Could the EEC-IV & CFI even make adjustments for each "side" of the engine? It does have separate injectors, but it seems like the air-fuel mixture would get combined in the intake after the CFI.