Ppurchase a special spark plug wire remover tool from any auto shop. Apply the tool twist back and forth and pull uptwards. If replacing the plugs apply anti seeing compound and apply dielectric grease to the boots of the plug wires directly into the boot. This will make removal of both very easy in the future.
Just twist and pull. If they break replace the wires too. How many miles on the truck. It is a good idea to replace the plug wires anyway.
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These details will help.
Thanks.
Use your crescent wrench to disconnect the positive and negative battery
cables. Be careful not to touch both battery posts together with your wrench,
as this will damage the battery and possibly harm you.
Use your spark plug socket to gently grab the insulated end of the spark
plug wire; pull it away from the tip of the plug. The spark plug socket looks
like a regular set of pliers, except that the jaws have rubber inserts to grip
the insulation without damaging it. The plug wire itself looks like a 15-gauge
wire with a rubber boot on each end: One end is connected to the spark plug
present in each of the eight cylinders, while the other end is connected to a
coil pack terminal, usually located on the right rear side of the engine
compartment. The coil pack is a square, black, solid-state component that has
eight terminals for each of the eight plug wires.
Use your spark plug socket to gently pull the coil pack end of the plug
wire away from the terminal. Repeat the last two steps until all eight wires
are removed.
Consult the service manual for your vehicle's year model and determine
the exact firing order. You will need to connect each new wire to the numbered
coil pack terminal and the corresponding engine cylinder. Failure to replace
the wires in the right order will result in failure of engine operation.
Use your crescent wrench to reconnect the battery cables (black wire to
black terminal, red wires to red terminal).
Start the vehicle and make sure it is running smoothly. If you hear
misfiring in the engine, use the spark plug wrench to make sure all the
connections are properly seated. If the condition continues, you will need to
further diagnose the electrical system.
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