Why wont 1 spark plug fire

Sounds like you have crossed the spark plug wires...(wrong firing order:) Check with the store where you purchased the new plugs...they should be able to provide the correct firing order...also you must locate cylinder #1 to begin...and confirm the pattern of the firing order...sounds harder than it is...Hope this helps.

It sounds like the spark plug wires are not plugged into the correct place on the distrubutor. take the distributor cap off and crank the engine over. Make a note of which direction the rotor spins. (Clockwise, or Counterclockwise) then find the firing order for that engine. Sometimes the firing order is on the intake manifold. (if you tell me which engine it has, the 4 cylinder 2.0, or the 6 cylinder 2.5; I could post you the firing order). Now on the distributor cap there is one wire post that has the #1 on it, that would be where you put the spark plug wire from cylinder 1. Following the rotation of the distributor rotor, you would put the spark plug wire for the next cylinder in the firing order after the #1 wire, and so on.

CHANGE SPARK PLUGS.YOU NEED SPARK PLUG 3/8 SOCKET.YOU NEED SHORT AND LONG 3/8 EXTENSIONS.YOU NEED SPARK PLUG BOOT PULLER AND A SPARK PLUG GAUGE SET THE SPARK PLUG GAP.NOW CHANGE 1 SPARK PLUG AT A TIME SO YOU MIX THEM UP GET FIRING ORDER MIX UP CAR BACK FIRE WONT CRANK.ALSO CHANGE PLUG WIRES ALSO.

Perhaps a bad or fouled injector? Pull the plug lead and see if you can detect gas in the chamber when you pull the plug. Good luck!

WELL YOU CHANGE PLUGS GOOD TO CHANGE WIRES ALSO.YOU REPLACE ONE AT A TIME SO YOU WONT GET CONFUSED.YOU NEED A SPARK PLUG SOCKET TORQUE WRENCH.A 3/8 RATCHET.SHORT AND LONG EXTENSION.SPARK PLUG GAUGE. YOUR FIRING ORDER IS 1 3 7 2 6 5 4 8 THIS FIRING ORDER FOR THE 4.6L V8 AND 5.4L V8 ENGINE.

It is stamped on the top of the engine, in the head. It is usually pretty easy to find, and you wont have to remove any pieces to see it.

pull one plug wire insert screw driver intothe spark plug boot getthe screw driver 1/4 inch away from a good ground and where it won't move. crank engine over if yo see a blue spark then you have another problem if it does nor spark yo have a bad coil or contact set.

Without knowing what kind of car you have...It may have jumped time? Timing belt or gear?
You have spark and fuel, Just might be at the wrong time? See if #1 piston is at top when #1 plug fires.

remove the dizzy cap, crank motor over to find out the rotation of the rotor. Remove the no.1 spark plug and bring no.1 piston up to top dead centre on compression stroke, mark side of dizzy body where the end of the rotor points to, replace dizzy cap and see which lead it lines up with.
that will be your no.1 lead, find the firing order and put the leads back on the dizzy cap in the direction of the rotors rotation, run those leads to the corresponding plugs and it should start.

EF & EL are 1,5,3,6,2,4
EF has a coil pack under the inlet manifold the EL has a distributor
EF uses a waste spark system so 2 plugs are fired at the same time eg 1 & 6 - 2 & 5 - 3 & 4