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I had a 94 ranger, same setup as you. 2.3, 5sp, 3.08 rear end. I have an idea for you. When i had mine, i swapped injectors. The stock ones have a single stream much like a washer fluid nozzle that squirts gas into the manifold. I got a set of four from the junkyard (i think it was an early 2000’s focus, i don’t remember but i know they were the same pound rating) that have the four small holes on them that “mist” the fuel instead of squirting it. Now, i don’t have any real-world mpg data or FE records since the truck didn’t make it much longer, but i can tell you that i hooked it up to the MAC scanner at work. With the stock injectors the fuel trim was between -1 and +1. With the focus injectors it was between -12 and -10. That was only tested at idle, since the obd1 plug was under the hood. If you have time and a cheap u-pull-it junkyard close by, it may be worth a shot.
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