watchamakalit Posted September 2, 2021 Share Posted September 2, 2021 Changed my plugs today. Anything stand out to anyone? If memory serves these have about 20,000mi on them. Link to comment Share on other sites More sharing options...
89 MJ Posted September 3, 2021 Share Posted September 3, 2021 They look pretty good. A little lean, but that’s the way these trucks run. Link to comment Share on other sites More sharing options...
watchamakalit Posted September 3, 2021 Author Share Posted September 3, 2021 A little lean is surprising. I ran a flowmaster with no cat for a good bit of those miles and I thought it always seemed a little rich. Link to comment Share on other sites More sharing options...
89 MJ Posted September 3, 2021 Share Posted September 3, 2021 2 hours ago, watchamakalit said: A little lean is surprising. I ran a flowmaster with no cat for a good bit of those miles and I thought it always seemed a little rich. Mine doesn’t have a cat either. It runs lean too. Link to comment Share on other sites More sharing options...
Parei_doll_ia Posted September 5, 2021 Share Posted September 5, 2021 On 9/3/2021 at 5:21 AM, watchamakalit said: A little lean is surprising. I ran a flowmaster with no cat for a good bit of those miles and I thought it always seemed a little rich. Free-er flowing exhaust without tuning to add more fuel will cause any FI system to run lean. It's not a big difference though, and your plugs are fine. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now