I have a 1986 ranger with a 2.9v6 with 84499 miles on it. recently pulled the motor and put new gaskets on it and now with everything hooked backed up it wont start. .its getting fuel but no spark. i have put a new ditributor in it along with new wires, also have a new optima battery in it, sparkplugs and a new ignition module as well. could it be the coil? any ideas please let me now.