1997 Ford Explorer will not start. Brand New battery. I performed a Tune up to try and eliminate the 3rd cylinder miss fire, but a week after tune up was performed the Vehicle will not start.

SOURCE: repair 3rd or high mount brake light 1995 1996 1997 ford explorer

Bought the light kit from realbrightleds.com

SOURCE: 1997 Ford Explorer XLT wouldn't start

Could be any of the following. Coil, Distibutor Cap, Rotary Button.

SOURCE: got misfire in cylinders 1 & 2 after tune-up

move the coils on plugs 1 & 2 to plugs 3 & 4 or 5 & 6 etc, does the misfire move with the coil? if so replace the coils

SOURCE: 1997 ford explorer ignition problem

Are you aware? you have the key and tumbler and another part under the dash on the steering column called the ingition switch.
They both have to be aligned in sync to operate properly.
Question? is this a tilt steering wheel,if it is and you dont know anything about it I suggest you get a professionel to do this kind of job.
You really have to know what your doing for this one.

SOURCE: 2001 ford explore sport cranks but will not start.

TUNEUP? WHAT WAS CHANGED?NEED TO CHANGE WIRES,PLUGS CAP&ROTOR ELECTRIC COIL, CHANGE THE FUEL FILTER,IF STILL THE SAME?TAKE OUT THE FUEL FILTER IF WET THEN OK, BUT IF DRY THEN ,FUEL NOT GETTING TO THE ENGINE,CK WIRES TO AND FROM THE PUMP,STILL THE SAME THEN NEW PUMP