- Joined
- Nov 30, 2001
- Messages
- 6,937
- Points
- 5,101
- City
- Gnaw Bone, Indiana
- Vehicle Year
- 2007
- Transmission
- Manual
If that's a 12-valve 2.6 motor, it's for the soot filter. Once in a while it has to burn out the build-up and it uses a spark plug thing in it. Look for a chamber right in front of the catalyst in the exhaust (or maybe behind). It should run to that. That's why those engines have an extra valve per cylinder.

