Quote:
Originally Posted by tangomar
"atmospheric or barometric pressure sensor".
Sorry for the ignorance, do you mean the MAP sensor?
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No, there is a definite difference. They are totally separate sensors. Manifold Air Pressure sensor senses the air being pulled into the throttle body to adjust fuel ratio for engine demands. More air more fuel. The atmospheric or barometric pressure sensor (name depends on manufacturer) senses ambient pressure (altitude) for optimum fuel/air ratio. Less air pressure (higher altitude) less fuel.
The reason for the pot switch. You only mess with one sensor. No ECU warning lights. O2 and MAP sensors can be messed with but are more complicated and can cause warning lights. This is just a much easier alternative without all the fuss achieving the same results.
Ignorance excused! Lesson learned and others were probably thinking the same thing but afraid to ask.
There are no dumb questions unless you already know the answer before you ask it. Or you don't know the answer and never ask.