This can't work. The MAF doesn't output a fixed signal. More airflow equals a higher voltage or frequency. By replacing it with a resistor you are tricking it into believing there is X amount of airflow, which kills all drivability except in the tiny window for which the resitor represents.Not only that, but Ford uses MAF to determine barometric pressure which is a huge factor in fuel delivery. Make sense? Replacing the Intake air temp sensor with a resistor is a pretty common practice though.