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HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG PROFESSIONAL

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HOW TO INSTALL SPARK PLUGS ON A 1999 MUSTANG PROFESSIONAL

The content contained in this article is for entertainment and informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic. Learn more about quality spark plugs, find your car part, or find where to buy your auto part today. Changing the routing from the original OEM routing can lead to early spark plug wire failure.

Bundling of spark plug wires and wrapping them with tape, pulling them through metal tubes or dressing them tightly against the engine, may make them look neat but can cause serious voltage losses and/or crossfiring.

The high voltage stresses will be increased at these points and hasten wire failure.

Never clamp spark plug wires tightly or allow them to be pinched between the air cleaner and the distributor.

(3) Ensure the spark plug wires aren’t routed parallel to a sensor wire. (2) Always check radio noise with the hood closed and latched.

A couple of things to keep in mind if you have more radio noise upon completion - (1) Metallic wire sets can radiate the ignition noise like an antenna.

To avoid arc-over, do not route wires of consecutively firing cylinders next to each other. Route the plug wires exactly as they were originally.

Wipe off the spark plug insulator and distributor cap towers before installing new wires.

It can take a few hours for an engine to cool. Underhood environment can be very warm – only remove the spark plugs wires when the engine is cool to the touch.

Make sure your car's engine is cold before you start.

Make sure the terminals are sealed properly and then firmly force any air out of boots and nipples.

Good spark plug terminals are made with a snap ring that give a metallic “click” or “snap” when they are properly set into place. This protects them from the heat of the manifolds and reduces capacitive voltage loss between the conductor and metal surfaces. Route the new spark plug wires away from the exhaust manifolds or other metal objects. It’s best to hold spark plug wires in position by using insulated metal, or better yet plastic or fiber brackets to avoid this. Spacing spark plug wires too close or parallel to each other can also result in crossfiring due to the inductive field which builds up in one wire as the current flows in the other. When routing spark plug wires to cylinders it’s important to do so in sequence of the firing order to avoid crossfiring. When correctly aligned, the wire will go on easily and you will hear a “click.” Test by pulling back tightly if the wire comes off easily, it is improperly installed. The end should snap on firmly with the boot over the spark plug insulator. When installing the spark plug end of the wire, push the wire on the spark plug while holding the end of the boot.Roll the edge of the boot gently to let out excess air otherwise the boot may not seat properly, causing the wire to dislodge from the cap. To install a new wire, push the new spark plug wire boot on one end to the module, and then push the next end onto the spark plug.Improper installation of these wires can result in poor combustion or misfiring of the cylinder, which will cause drivability issues and potentially severe damage to the engine. What is even more imperative than matching cable length is that you do not mix up the order of the spark plug wires. Do not match for identical length as this varies with different wire manufacturers. Match the longest wire in the new set with the longest wire on the vehicle, then match the next longest, and so forth.