efie or map

[Klijanow]

i have resently installed a map sensor in my 03 Dodge 1500 5.7, what is the real difference between useing a efie or a map.

[Q-Hack!]

Both work to cheat the cars cpu into thinking that the fuel/air mix it richer than it needs to be. The EFIE does this by changing the voltage levels of the O2 sensor. The MAP enhancer does this by changing the voltage levels of the Manifold Air Pressure sensor. Which is better is more of personal preference. Generally the EFIE is a set and forget it device where the MAP enhancer is more tweek while driving.