What is an ignition coil?
The coil is the part of a car’s ignition system that takes the battery’s 12-volt output (called low-tension current) and transforms it into as much as 45,000 volts (called high-tension current) before then supplying it to the engine’s spark plugs. It is typically just a wire wound transformer filled with an insulator.
Tools needed for this job:
- 5.5mm Socket
- 7mm Socket
- CRC QD Electronic Cleaner
- CRC Di-Electric Grease
- Soft copper wire brush
- New plug wire set is recommended for best results
- Disconnect the negative battery cable from the vehicle
- Label and Remove all plug wires from the coils (firing order can be found below for the 3800 and the 60° V6)
- Using the 5.5mm Socket, remove both screws from each coil pack
- Using the 7mm socket, unscrew the connector from the bottom of the module (60° V6 just have 3 plugs)
- Using the Electronic Cleaner, spray the top and bottom of the coils where they connect to the wire and tabs, clean using the copper brush.
- Using the Electronic Cleaner again, clean the connections on the module at the point where the coils connect and the connector(s) itself.
- Using the Electronic Cleaner one last time, clean the connector(s) from the engine harness.
- Let dry.
- Once everything is dry, apply the Di-Electric Grease to all connections, coils top and bottom, module connector(s) and plug boots.
- Reinstall the module on the vehicle
- Reinstall each coil
- Plug in all connectors and wires as they were before removal
- Clean the area of any extra Di-Electric Grease
2.8, 3.1 & 3.4 Firing Order
3100 & 3400 Firing Order
3800 Firing Order