I had a similar problem with intermintent failure with starting. what i
found was a little electrical connector (black 90 degree) under the hood
on the driver side wall close to the windsheild was slightly rusted. I
simply sanded off the rust,put a little WD40 and slightly crimped it to
prevent it from vibrating loose. Since then my aerostar has started every
time in all weather. I wish i could find another new 97, would buy it
instantly! Hope this works for you..