catalytic converter overkill
Thread Starter
|
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
catalytic converter overkill
so i'm starting to have problems with my cats after 225,000mi, and went to the local exhaust pros to have them build me a header-back system with high flo cats. They told me that there were 4 cats and 4 cats would have to be put back on. Is there anyway to put just two cats on? i noticed there isn't any sensors between the two on each side like on chevys so i don't see why it wouldn't. Has anyone run across this? I just want 2.5in dual pipes all the way out like it is now (pipes have been on since new and are very rusty) with 2 hiflo cats and run the o2 sensors as much factory as i can.
Thread Starter
|
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
thanks frankford for the quick reply! however, i live in kansas and we have no emission laws that i know of, and if there is there are no enforcement measures to speak of. so i guess what i need to know is if i can run the hi flow cats without causing any computer or driveability issues.
New User
Joined: Aug 2007
Posts: 4
Likes: 0
cats
I have a 97 150 that I put headers on and dropped the Y pipe and hollowed
the rear two converters. With a flowmaster cat back the truck runs great
and passes emissions and I live in pennsylvania . I believe that the two rear (cats) are for sound tone ,also I just flipped 200k
the rear two converters. With a flowmaster cat back the truck runs great
and passes emissions and I live in pennsylvania . I believe that the two rear (cats) are for sound tone ,also I just flipped 200k
Thread Starter
|
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
okay thanks thats what i was looking for! have you done this or can anyone else verify 97handshaker's info?
Trending Topics
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
Originally Posted by superdutymj
i live in kansas and we have no emission laws that i know of, and if there is there are no enforcement measures to speak of.
As long as the two cats you install address all of the things the 4 cats you have now do, you are legal. You can't replace the factory 3 way cats with 2 way cats.
Why do you think you have catalyst problems?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Posting Guru
Joined: Jul 2007
Posts: 1,853
Likes: 0
You can run with 2 cats just fine and not get a light.
And no they cant legally stop you on suspicion. The feds have no enforcment procedures on emmisions so thats an empty threat. As long as you dont have local testing your good to go.
And no they cant legally stop you on suspicion. The feds have no enforcment procedures on emmisions so thats an empty threat. As long as you dont have local testing your good to go.
Thread Starter
|
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
the exhaust note from my truck has changed to a more muffled sound and i'm getting horrible gas mileage, and the truck has a quarter million miles so i figured they're getting clogged. why can you not replace 3 way cats with 2 way, whats the difference? I was going to get rid of the precat and just run the two high flo cats.
Thread Starter
|
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
thanx scott you've answered all my questions! i had planned on building a new system, cuz my pipes are rusted badly as i stated in the original post. would 2.5" pipes be too big? i don't want to lose all backpressure. 3" would sound cool, but were almost to big for my V10, let alone a 1.4L smaller V8.
New User
Joined: Jan 2008
Posts: 5
Likes: 0
I have a 97 f-150 with 206,000 miles, and had the same problem with cat clogging about a year ago. I called a few people and found out that I could get a custom manifold back true dual exaust system eliminating the 4 cats completely for 350 bucks, as opposed to the $1300 for just the cats. The only problem I ran into was I had to put 97 model ford mustang o2 eliminators ($140) on the rear two o2 sensors to avoid the engine code problem. I also learned that there wasn't a manufacture of cats that would work with no engine codes besides the factory ones.
The o2 eliminator manufacture said that until my computer reprogrammed itself I might get an engine light. sure enough I did, but It went away and hasn't returned for at least 9 months now.
The o2 eliminator manufacture said that until my computer reprogrammed itself I might get an engine light. sure enough I did, but It went away and hasn't returned for at least 9 months now.