Need help installing new ignition coil packs and spark plugs on your 99-04 F-150 SVT Lightning.
The 1999-2004 F-150 SVT Lightning features a 5.4L supercharged 2V mod motor. The ignition system is made up of two simple components: Spark Plugs and Ignition Coil Packs. This design eliminates the spark plug wires and single ignition coil found on first generation SVT Lightning in return for the ignition coil packs.
Replacing your spark plugs and ignition coils on your second generation Lightning will inevitably be part of your maintenance schedule. The OE Ford coil packs do eventually fail and that is where I found myself on my personal SVT Lightning. I purchased this Lightning as truck that needed a lot of restoration and TLC. It had 170,000 miles on it and had been used as a work truck. On the plus side it had never been modded with a single performance part!
While I took possession of my 2000 SVT Lightning it had a rough idle so I decided to start with the ignition system. Due to the high mileage and no idea if the plugs had ever been changed in the 170,000 miles I figured it was a good place to start. Boy was a dead! I found pure carnage once I got the plugs and coils removed.
For this installation I opted for the following components to completely upgrade my ignition system:
Installation will require the following tools:
Installation will take you roughly 1-2 hours. The rear two plugs will give you the biggest headache due to tight space and surrounding hoses and sensors. Installation will require to you remove your fuel line from your fuel injectors. This will give you more room to access the coil packs. Each coil pack is held in place by one XXXmm nut. Once you remove this you can simply twist and pull up on the coil pack to remove. Occasionally the rubber boot may stay in the cylinder head when you pull on the coil pack. You can take a pair of needle nose pliers to gently pull the boot free if you stay behind.
Once you have the coil packs removed, you can now take your ratchet, extension and spark plug tool socket. Remove the spark plugs and inspect them for any obvious damage, unusual build-up or discoloring. Once the original plug is removed you can now gap your new plug and install it (See Below For Gapping Tips). Once you install your new plugs, take your new coil packs and reinstall them by firming pressing down on them. Reconnect the electrical plug on the coil pack and reinstall the coil pack bolt. Repeat on all plugs and reinstall fuel rail.
Stock SVT Lightning plugs are gapped at .042. If you are running a pulley that increases boost over factory levels you need to remember the simple rule of decreasing gap by .001 for every pound of boost over factory. So if you are running a 4# pulley you would decrease the spark plug gap by .004 and set it at .038. If you are running increased boost levels over 4 pounds. You will need to look for a “colder” plug than the NGK TR6. Consult with your local tuner on what is the correct plug for your engine and supercharger combinations.