The other day on my way to work i started my tribute and the car started to studder basically the interior lights dimmed slightly and my idle dipped slightly as well.. i drove the car a bit and it started to happen more frequently. the next day it didnt happen and hasnt happened since.. has this happened to anyone else on here? any suggestions what it could be?

 

Run a search on "rough idle" within the Tribute forum. Quite a few posts that may help give some insight.