pSycHOarsOnisT
Well-Known Member
Im assuming they are all like this but im wondering why in hell are there 4 cats and 3 o2 sensors on my 2002 4.0? Seems like complete overkill to me
-
Welcome Visitor! Please take a few seconds and Register
for our forum. Even if you don't want to post, you can still 'Like' and react to posts.
Why 4 cats?
- Thread starter pSycHOarsOnisT
- Start date
- Joined
- Aug 30, 2007
- Messages
- 2,439
- Age
- 38
- City
- Cass Co, Missouri
- Vehicle Year
- 1994
- Transmission
- Manual
So you can scrap 2 of them, and buy a Flowmaster.
...practically free!
...practically free!
- Joined
- Aug 8, 2007
- Messages
- 7,916
- Age
- 37
- City
- Terrace, BC, Canada
- Vehicle Year
- 1991
- Engine
- 4.0 V6
- Transmission
- Automatic
- Tire Size
- 40s
Because the front 2 cats and the rear 2 cats do different jobs. The 2 upstream o2's control air/fuel ratio and the 1 down stream monitors the cats to make sure they are doing their job like they should.
James86
Well-Known Member
- Joined
- May 6, 2009
- Messages
- 889
- City
- 55381, Minnesota
- Vehicle Year
- 1999,
2012,
- Transmission
- Automatic
- My credo
- WHY DO I KEEP BUYING DODGES?!?!?
I imagine it may also have something to do with making an older engine with it's roots in the 60's meet today's emission requirements.... My friend's Camaro had 4 cats for the 3.8 it had and 4 O2's I believe. I remember him grumbling about it...
Sponsored Ad
Sponsored Ad
TRS Events
Member & Vendor Upgrades
For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.
Recently Featured
Ranger Adventure Video
TRS Merchandise
Follow TRS On Instagram
