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?
That another symptom clearly shows that sensor output do not reach the board.
Gints
OK, I'll pull out the board and trace continuity.....
Ah...EC18 pin 6 pad to pin 1 MPX4250AP hole. Missed that one.
Wow, I drove a lot of Kms on one MAP value! :o
Quote from: SPatrickB on December 30, 2013, 01:05:31 PM
Ah...EC18 pin 6 pad to pin 1 MPX4250AP hole. Missed that one.
Wow, I drove a lot of Kms on one MAP value! :o
lucky you :D