I have an issue with the MAP input where the kpa value (in VemsTune) appears to stay around 75 - 80 kpa irrespective of how I drive the (supercharged) car.
I use an external 2 bar sensor and the VEMS 3.6 was ordered and came without the onboard sensor.
When I have the ignition on, I see good ground, 5v at the sensor supply with about 2.5v output to the correct pin (6) on VEMS. When I apply mouth suction I see a drop of ~1 volt, so it appears the sensor is working OK.
Another symptom is when the VEMS is initially powered, the kpa starts very low and creeps up to 80 after a minute or so which to me gives the appearance that the signal is floating perhaps.
Any ideas?
