I have spotted another error in the wiring of the MAP sensor:

It should be:
3-bar GM Sensor
* Ground on Pin A,
* Sensor output on Pin B, and
* +5 Vref on Pin C.
according to http://www.megamanual.com/v22manual/3bar.htm
So the picture should show:
A goes to pin 20
B goes to pin 24
C goes to pin 28
Regards
Stephane