Vacuum question... isn't MAP only for cars with mass air flow... is there a MAP vacuum line for speed density?? If so where is it located on the manifold... anyone know where the FPR vacuum line is located on the manifold??
MAP or Manifoid Absoulute Pressure is only used with speed density cars. It pick up vacuum from the intake manifold and measures it.
Mass Air cars use a Baro sensor that is vented to the outside air. There is no vacuum line or any other tubing connected to the Baro sensor. It measures barometric pressure that the computer uses to calculate the air/fuel ratio.
The actual sensor electronics are the same between both Baro and MAP sensors.