When do you need to replace spark plugs
Grand Champion
Joined: May 2019
Posts: 5,146
Likes: 721
From: S.W. Indiana
OK, I took the Citadel on a trip last week end, and 2 strange things were evident, one is not related to the spark plugs, but one may well be. When the vehicle is not fully warmed, there is a definite shutter at low revs that diminishes but doesn't fully disappear once it has reach full temp. It is the 3.6 motor and I am wondering if others may have had a similar problem? The other issue that I will have checked this week is that at highway speeds the vehicle is very sensitive to all road imperfections, so it has a tendency to wander and gives a rough ride. My guess is that the shocks, or what ever they are now called, need replacing. Any thoughts?
At 120,000 miles, you definitely need shocks. Struts are shocks with springs on them. I generally replace shocks every 50,000 miles and struts every 90,000. I probably should replace them sooner but struts, unless you get quick struts, are fairly labor intensive and youy often need to realign the front end after replacement.