1) buy new ones. by referring to the VIN you should be able to get a set of the correct ones. 2) Remove one wire from car, compare to the new ones until you find which one that has the correct length. 3) install the new one 4) repeat from 2.
Try a new fuel filter. If not that, replace plugs and plug wires. It's called a tune-up.
Pull them out and replace them one at a time.
take it to dealer
I'd replace the wires on at a time. I have a special plug wire puller pliers that helps to avoid breaking the wires if you can't get them off the sparks plug.
you have to replace all of your spark plug wires. there is a coil built into the top of each boot that goes over each spark plug. that's why the wires are so costly.
Replace the spark plugs and plug wires.
you have to replace your spark plug wires there is a coil on each wire for each cylinder.
If you do not have any problems with plugs, change them when you replace the timing belt (do not forget to replace the spark plug wires too).
You should never need to replace the wires leading to the spark plugs. The 2003 Miata has a coil pack at each spark plug (inside the spark plug hole). The wires leading to the coils are low voltage and should never break down.
Use a spark plug socket with extensions.
For the US model Ford Focus (2006), spark plugs are the only thing to replace. There are no spark plug wires. Ford recommends spark plug replacement at 100k miles.
You should have C.O.P. ( coil on plug) there are no wires.