Have spark and hAve fuel to fuel rails,but it cranks and will not start,??

Try to crank vehicle no luck, if you put power to the small wire on the starter it will crank

My Windstar 98 wont start. I believe its the Immobilizer bcoz its not totally engaging. Anyone here who knows how to fix it ? Thanks

Theft light doesnt do its on for 3 seconds then off approval cycle engine wont crank then after trying it for a few minutes then evreything will work fine till next morning then problem returns