Dodge: 90 turbo cravan code 13

The first step is to make sure you have vaccuum at the map sensor,and a
good connection, been so long since i dealt with a map code, i forget if
the 13 is vacuum or electrical, But if there is a code, im sure the
vehicle is running rich at idle, if you got at least 18 inches at the
sensor, a good ground at the (i believe the blue/black wire) and 5 volts
at the (i belive the orange wire) the map sensor is bad
Glenn Beasley
Chrysler tech