Here's my notes on experimenting with a map sensor on the bench with a brake bleeder pump and a duino. using a 5 volt reference.
inches of mercury, pin value
ambient, 762
3, 667
5, 619
8, 543
10, 493
14, 390
~25.18 units per inch
Map pinout (your sensor may be different)
Code:
connector _________
front (_________)
||
A B C
+5 - Signal (on analog 1)
looks pretty linear till you get near ambient. The cheap gauge on the pump probably has a lot to do with that.
Code:
int mapPin=1;
void setup(){
Serial.begin(9600);
}
void loop(){
Serial.println(analogRead(mapPin));
delay(500);
}