The number 1 plug wire on a 454 Chevy engine typically connects to the spark plug located in the front-left (driver's side) cylinder. You can refer to the firing order diagram for your specific engine to ensure the correct placement of the plug wire.
The number #1 plug is the forward-most plug on the left (driver's) side. Trace that wire back to the cap and you've got your answer.
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check for spark from the number one plug wire if no spark then start with the coil
Bad plug or Plug wire
What engine and what year?
the one inline with the coil in front to the left
Need to know what engine you have.
1,8,4,3,6,5,7,2.
Could be a faulty spark plug or spark plug wire.
That is the rubber boot that is on the end of the spark plug wire that goes onto the spark plug.
whichever spark plug or wire you change, that your problem...its the connector on the plug wire..broken, bended or cracked... treyville