texasfishingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
TraeMartin, Power-Pole CS, T-Rigger, JoeGoes, EcKo
119150 Registered Users
Top Posters(All Time)
hopalong 120,585
TexDawg 119,524
Bigbob_FTW 94,903
John175☮ 85,892
Pilothawk 83,264
Bob Davis 81,523
Mark Perry 72,297
Derek 🐝 68,312
JDavis7873 67,416
Forum Statistics
Forums59
Topics1,037,859
Posts13,935,709
Members144,150
Most Online39,925
Dec 30th, 2023
Print Thread
Running with no Catalytic Converter #12764697 05/22/18 12:30 PM
Joined: Nov 2003
Posts: 6,774
H
Holzer Offline OP
TFF Celebrity
OP Offline
TFF Celebrity
H
Joined: Nov 2003
Posts: 6,774
Let's say some thug cuts off 1 of the 2 catalytic converters you have on your truck.
Instead of replacing the converter you just add a straight pipe.

Running the truck afterwards, check engine light is on and the code you get is basically for a faulty convert/no converter. When I asked others about this scenario, I have been told:

- The engine will continue to run just fine. But you'll have the check engine light to deal with come inspection time.

- The engine will run a little leaner. Fuel mileage will drop but nothing really noticeable.

So what's the bottom line as far as how your engine is going to run, what to expect, Good/Bad to do, not good long term, converts are just a B.S. emissions part and not needed, etc.? Your thoughts?


Holzer
My pic is gone frown
Re: Running with no Catalytic Converter [Re: Holzer] #12764718 05/22/18 12:37 PM
Joined: Jan 2005
Posts: 7,485
R
redchevy Offline
TFF Celebrity
Offline
TFF Celebrity
R
Joined: Jan 2005
Posts: 7,485
Engine will be fine, but you will have the check engine light.

Re: Running with no Catalytic Converter [Re: Holzer] #12764832 05/22/18 02:03 PM
Joined: May 2013
Posts: 444
M
MarcM64 Offline
Angler
Offline
Angler
M
Joined: May 2013
Posts: 444
Like Redchevy said...Engine will run fine, check engine light will be on, BUT it will not pass a state inspection!

Re: Running with no Catalytic Converter [Re: Holzer] #12765121 05/22/18 05:19 PM
Joined: Apr 2004
Posts: 13,992
S
Stump jumper Online Content
TFF Guru
Online Content
TFF Guru
S
Joined: Apr 2004
Posts: 13,992
Not sure if no cats will affect the back pressure. If it does you might lose a little low end torque.


2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
Re: Running with no Catalytic Converter [Re: Holzer] #12765131 05/22/18 05:24 PM
Joined: Jul 2012
Posts: 12,214
Cast Offline
TFF Guru
Offline
TFF Guru
Joined: Jul 2012
Posts: 12,214
Just complete the bypass and get a tuner to adjust around the bypass. Itll run better.


Cast


[Linked Image]

I have a short attention spa
Re: Running with no Catalytic Converter [Re: Cast] #12765329 05/22/18 07:31 PM
Joined: Nov 2003
Posts: 6,774
H
Holzer Offline OP
TFF Celebrity
OP Offline
TFF Celebrity
H
Joined: Nov 2003
Posts: 6,774
Originally Posted By: Cast
Just complete the bypass and get a tuner to adjust around the bypass. Itll run better.


Thought about that as well.



OK, sounds like all should be fine.
Thanks


Holzer
My pic is gone frown
Re: Running with no Catalytic Converter [Re: Holzer] #12765449 05/22/18 08:33 PM
Joined: Jan 2009
Posts: 1,645
S
spankyttx Offline
Extreme Angler
Offline
Extreme Angler
S
Joined: Jan 2009
Posts: 1,645
the front o2 sensor monitors exhaust gases out of the engine for lean or rich conditions, the rear o2 sensor monitors emissions out of the cat. so fuel mileage, so to speak, will be from the front o2. so no tuning or tuner needed


LI-SI-WI-NWI
Re: Running with no Catalytic Converter [Re: Holzer] #12766662 05/23/18 06:09 PM
Joined: May 2009
Posts: 975
M
MAK747 Offline
Pro Angler
Offline
Pro Angler
M
Joined: May 2009
Posts: 975
If it was stolen by some low-life thieving scum mad Then call police and get a report, turn it into your insurance and then have it replaced at the dealership. You're out the deductible but you wont have to worry about inspection issues, warranty issues (if still under warranty) or depreciated value when you decide to sell it or trade it in. Tampering with the emissions system by trying to bypass it or fool the ECM/ECU may come back to bite you in the future.

Last edited by MAK747; 05/23/18 06:14 PM.
Re: Running with no Catalytic Converter [Re: Holzer] #12798693 06/20/18 03:38 AM
Joined: Mar 2005
Posts: 1,382
F
Freeman Clark Offline
Extreme Angler
Offline
Extreme Angler
F
Joined: Mar 2005
Posts: 1,382
You a breaking the law anytime you change are tamper with the emission system.A lot of the guys running coal burners are tampering with there emission systems. Will cost them when they get caught.

Re: Running with no Catalytic Converter [Re: Holzer] #12800702 06/21/18 06:29 PM
Joined: Mar 2003
Posts: 10,699
F
Fishin' Nut Offline
TFF Guru
Offline
TFF Guru
F
Joined: Mar 2003
Posts: 10,699
Another solution, you could move to Alabama which doesn't do state inspections! grin


Originally Posted by OTFF
He is truly a sick individual.
Re: Running with no Catalytic Converter [Re: Holzer] #12801884 06/22/18 06:49 PM
Joined: Mar 2012
Posts: 3,509
A
ACAMS Offline
TFF Team Angler
Offline
TFF Team Angler
A
Joined: Mar 2012
Posts: 3,509
What vehicle is this .... most don't know the cat has been gutted/removed unless the o2 sensor is throwing the code.

What I am getting at is that somebody with HP Tuners or EFI Live can turn it off and even tune for better performance and mileage.


><\\\(º>___><\\\(º> http://myfolderz.com/Jigs/Jigs.php_<º)///><___<º)///><


Free image uploader for TFF members: http://myfolderz.com/TFF/pics.php
Re: Running with no Catalytic Converter [Re: Holzer] #12801927 06/22/18 07:11 PM
Joined: Oct 2016
Posts: 2
H
hillyryan Offline
Green Horn
Offline
Green Horn
H
Joined: Oct 2016
Posts: 2
Have any of you done business with a Colby Lehman?

Re: Running with no Catalytic Converter [Re: Holzer] #12803083 06/23/18 10:06 PM
Joined: Mar 2005
Posts: 1,621
P
psycho0819 Offline
Extreme Angler
Offline
Extreme Angler
P
Joined: Mar 2005
Posts: 1,621
Look up " exhaust test pipe", then get a tuner to do the work around, or not. If flanged and bolted in, you can even swap them out come emission time and have the best of both worlds.


If you're not living on the edge, you're taking up too much space!
Previous Thread
Index
Next Thread

© 1998-2022 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
Powered by UBB.threads™ PHP Forum Software 7.7.3