How do you change sparkplugs on a 1994 ford tauras?

Answer 1

The spark plugs used in your car require a deep spark plug socket for removal and installation. A specially designed pair of wire removal pliers, Spark Plug Wire Remover T74P-6666-A or equivalent, is also a good tool to have for vehicles other than the 3.0L/3.2L SHO. The special pliers have cupped jaws that grip the plug wire boot and make the job of twisting and pulling the wire from the plug easier.

When you are removing spark plugs, you should work on one at a time. Avoid removing the plug wires all at once because, unless you number them, they may get mixed up; if you must (or prefer to) do so, take a minute before removing the wires to number them with tape. The time you spend doing this will pay off later when it comes time to reconnect the wires to the plugs.

For easy access when servicing the spark plugs, remove the air cleaner assembly and air intake tube:

1) Disconnect the negative battery cable.

2) Twist the spark plug boot and gently pull it from the spark plug. For all vehicles except the 3.0L and the 3.2L SHO, using the special plug wire pliers will aid in ease of removal and prevent damage to the wire and inside connector.

**NEVER pull on the wire itself, as damage to the inside conductor couldoccur! If available, use Spark Plug Remover Tool Y74P-6666-A or equivalent toprevent the wire separating from its connector inside the boot**

3) The plug wire boot has a cover which shields the plug cavity (in the cylinder head) against

dirt.

After removing the wire, blow out the cavity with compressed air or clean it out with a small brush, so no foreign material enters the cylinder when the spark plug is removed.

4) Remove the spark plug with a plug socket. Turn the socket counterclockwise to remove the plug. Be sure to hold the socket straight on the plug to avoid breaking the insulator. A deep socket designed for spark plugs has a rubber cushion built-in to help prevent plug breakage.

5) Once the plug is out, compare it with the spark plug illustrations to determine the engine condition.

This is crucial since spark plug readings are vital signs of engine condition and pending problems.

6) Use a round wire feeler gauge to check plug gap. The correct size gauge should pass through the electrode gap with a slight drag. If you're in doubt, try the next smaller and larger sizes. The smaller gauge should go through easily and the larger should not go through at all. If adjustment is necessary, use the bending tool on the end of the gauge. When adjusting the gap, always bend the side electrode.

The center electrode is non-adjustable.

7) Squirt a drop of penetrating oil on the threads of the spark plug and install it. Don't oil the threads heavily. Turn the plug in clockwise by hand until it is snug.

**Do NOT use the spark plug socket to thread the plugs. Always thread the plugby hand to prevent the possibility of cross-threading and damaging the cylinderhead**

8) After the the plug is finger-tight, torque it to 17-22 ft. lbs. (23-30 Nm). DO NOT OVERTIGHTEN!

9) Thinly coat the inside of the boot and terminal with silicone dielectric compound (Motorcraft D7AZ-19A331-A or equivalent).

10) Install the plug wire boot firmly over the spark plug. Push the boot until it clicks into place. The click may be felt or heard, then gently pull back on the boot to assure proper contact.

11) Connect the negative battery cable.