I have a 96 Ford Ranger with a four cyl. engine that won't start. The fuel pressure is at the required 35 lbs. and its getting plenty of gas. Both primary and secondary coils are good and there is strong spark at the plugs. The plug in for the OBD system has been disconnected.I wonder if the crank sensor is bad but I can't tell without not being able to hook up my analizer. Any suggestions?