I just installed an adjustable MAP sensor on my 1992 YJ. I've done a little work to the 4.0l to make it breathe easier, and being a speed density system, there is no way for the pcm to see the increased airflow like on a mass air system.
I increased the input voltage to the sensor
By .2 volts. I check mileage on every tank of fuel and I usually get 16 mpg. My first tank after modifying the map sensor got me 17.25 mpg. Pretty impressive considering my yj is on 35" tires, and carries a good amount of extra weight. It never got better than 16 when it was stock with 30" tires.
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I increased the input voltage to the sensor
By .2 volts. I check mileage on every tank of fuel and I usually get 16 mpg. My first tank after modifying the map sensor got me 17.25 mpg. Pretty impressive considering my yj is on 35" tires, and carries a good amount of extra weight. It never got better than 16 when it was stock with 30" tires.
Sent from my PC36100 using Tapatalk