User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 12-07-2016, 11:17 AM #1
SCHUNTER1969's Avatar
SCHUNTER1969 SCHUNTER1969 is offline
Member
 
Join Date: Oct 2015
Location: South Carolina
Posts: 135
SCHUNTER1969 is on a distinguished road
SCHUNTER1969 SCHUNTER1969 is offline
Member
SCHUNTER1969's Avatar
 
Join Date: Oct 2015
Location: South Carolina
Posts: 135
SCHUNTER1969 is on a distinguished road
Cat Delete and DIY O2 Simulator

About two months ago I got a CEL for Low Catalytic Efficiency. I have been waiting for this to happen, it gave me a reason for cutting the cat. out. I have read on this website many times about aftermarket cats failing and having to pay some serious money for a OEM cat. Well I'd rather buy a new gun than pay $500+ for a catalytic converter for some tree hugger none sense. Also if you are going to talk about it being against the law for me to cut the cat out let me stop you right there. As long as it is safe to drive, I will configure my vehicle however I want. Now there are people who like to say the 3.4l likes some back pressure and it actually decreases low end power. Well until you show me a dyno test I do not believe you. You almost sound like those people who think the Deck Plate mod isn't worth it. If you increase air intake and better exhaust flow, you increase power.


I have a '99 4runner limited. The Deck plate mod and ISR delete are the only engine mods I have completed along with regular maintenance. I also replaced the stock exhaust with a flowmaster years ago.

FOR THE ACTUAL WORK:

1)There are two sensors, one before the cat and one after. Unplug the sensors. I have the cali emission exhaust so I have two cats. Also remove the rubber links that connects to the exhaust and frame support, get some WD40 in their.

2)The section of exhaust pipe with the cats and sensors can be unbolted. Three bolts hold it in place to the exhaust manifold, and two bolts hold it place about half way down the car. Separating this section of pipe from the section of pipe with the muffler. I had to heat up the bolts to remove them.

3)I cut the pipe in the middle, this allowed me to remove the pipe around the frame cross members.

4)Now that I had the pipe out of the car I removed the sensors, each one had two nuts hold it in place.

5)I cut the pipe right before and after the cats

6) $16 of exhaust pipe and couplings from O'Reillys, I welded the straight pipe in place of the cats.

7)Remember those rubber links? The support bracket on the old exhaust, I grinded the weld off removing it from the pipe and then welded it on the new straight pipe.

***O2 SENSOR SIMULATOR***
I ordered the following from amazon:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

8)I took the rear O2 sensor and carefully cut the protective wire cover. I cut the blue and white wire and soldered the resistor and capacitor just like the diagram I attached below. A lot of heat shrink, zip ties, and a good amount electrical tape you have your self an O2 sensor for $11.

9)Reinstalled the sensors, plugged them back in. Reinstalled the rubber connector to the exhaust support I relocated.


Two months now and I have no CEL. I can definitely tell the exhaust flow is better. I have not had a chance to do a MPG test because I have been driving like a mad man lately. BUT so far no adverse effects. If anything changes I will post here.
Attached Images
Cat Delete and DIY O2 Simulator-img_3292-jpg  Cat Delete and DIY O2 Simulator-img_3296-jpg  Cat Delete and DIY O2 Simulator-img_3304-jpg  Cat Delete and DIY O2 Simulator-img_3307-jpg  Cat Delete and DIY O2 Simulator-img_3308-jpg 
__________________
Built 1999 4runner limited

Last edited by SCHUNTER1969; 12-07-2016 at 11:20 AM.
SCHUNTER1969 is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 12:20 PM #2
shouldbeasy shouldbeasy is offline
Member
 
Join Date: Aug 2013
Location: somewhere
Posts: 203
shouldbeasy is on a distinguished road
shouldbeasy shouldbeasy is offline
Member
 
Join Date: Aug 2013
Location: somewhere
Posts: 203
shouldbeasy is on a distinguished road
Good timing on this - I just cut out my double catalytic converters to increase flow from the Doug Thorley headers straight through to the Borla Pro-XS muffler... I haven't taken it for a cruise yet and am wondering if my Spark Plug Fouler is going to offset the O2 sensor enough to fake out the signal to the ECU.

If not, I guess I'll be doing this! ha!
__________________
'01 4Runner Sr5 - The Money Pit
shouldbeasy is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 12:33 PM #3
JayRolla's Avatar
JayRolla JayRolla is offline
Elite Member
 
Join Date: Mar 2010
Location: CO
Posts: 6,012
JayRolla will become famous soon enough
JayRolla JayRolla is offline
Elite Member
JayRolla's Avatar
 
Join Date: Mar 2010
Location: CO
Posts: 6,012
JayRolla will become famous soon enough
Only reason I would go with an aftermarket cat is to use for a silencer. These things on a flowmaster get pretty obnoxious without a cat quieting it down.

Otherwise very nice writeup.
__________________
1996 Toyota 4runner Limited - 4" Lift, 33's, AOR Bumper w/winch
1990 Eagle Talon Tsi- E316G @ 32psi E85 Tuned, 272 cams, ECMlink v3.0, 405whp - Gave back to Brother
2012 Toyota Tacoma DCSB - Stock on 32's- Wifes
2004 Cadillac CTS-V - 5.7L LS6 v8, 6-speed 400hp/400tq - My new DD
http://www.toyota-4runner.org/3rd-ge...read-pics.html
JayRolla is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 12:38 PM #4
AntleredRuin AntleredRuin is offline
Senior Member
 
Join Date: Aug 2015
Location: TX
Posts: 1,192
Real Name: Daniel
AntleredRuin will become famous soon enough
AntleredRuin AntleredRuin is offline
Senior Member
 
Join Date: Aug 2015
Location: TX
Posts: 1,192
Real Name: Daniel
AntleredRuin will become famous soon enough
I don't specifically disagree with you about the 'against the law' part, but I'm assuming you checked your state inspection requirements.
Safe or not, in some states, you need a cat if your vehicle is a within certain age range, or they'll fail you outright. Arguing with the inspector over 'treehugger nonsense' won't do you any good.
This also will make it harder to sell your vehicle (if you plan on keeping forever, then nevermind) and you may need to reinstall BOTH cats if you move out of state.

Here in Texas you need a cat if you are 25 years or younger. I chopped the clogged cat out of my 34 year old Wagoneer a few years ago.

Agreed with JayRolla though: nice writeup.
AntleredRuin is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 12:55 PM #5
shouldbeasy shouldbeasy is offline
Member
 
Join Date: Aug 2013
Location: somewhere
Posts: 203
shouldbeasy is on a distinguished road
shouldbeasy shouldbeasy is offline
Member
 
Join Date: Aug 2013
Location: somewhere
Posts: 203
shouldbeasy is on a distinguished road
Here is my crap - quick sound clip.
__________________
'01 4Runner Sr5 - The Money Pit
shouldbeasy is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 01:04 PM #6
SCHUNTER1969's Avatar
SCHUNTER1969 SCHUNTER1969 is offline
Member
 
Join Date: Oct 2015
Location: South Carolina
Posts: 135
SCHUNTER1969 is on a distinguished road
SCHUNTER1969 SCHUNTER1969 is offline
Member
SCHUNTER1969's Avatar
 
Join Date: Oct 2015
Location: South Carolina
Posts: 135
SCHUNTER1969 is on a distinguished road
I live in South Carolina. I had never heard of emission tests before I started reading posts on this website!
__________________
Built 1999 4runner limited
SCHUNTER1969 is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 01:26 PM #7
JayRolla's Avatar
JayRolla JayRolla is offline
Elite Member
 
Join Date: Mar 2010
Location: CO
Posts: 6,012
JayRolla will become famous soon enough
JayRolla JayRolla is offline
Elite Member
JayRolla's Avatar
 
Join Date: Mar 2010
Location: CO
Posts: 6,012
JayRolla will become famous soon enough
Quote:
Originally Posted by AntleredRuin View Post
I don't specifically disagree with you about the 'against the law' part, but I'm assuming you checked your state inspection requirements.
Safe or not, in some states, you need a cat if your vehicle is a within certain age range, or they'll fail you outright. Arguing with the inspector over 'treehugger nonsense' won't do you any good.
This also will make it harder to sell your vehicle (if you plan on keeping forever, then nevermind) and you may need to reinstall BOTH cats if you move out of state.

Here in Texas you need a cat if you are 25 years or younger. I chopped the clogged cat out of my 34 year old Wagoneer a few years ago.

Agreed with JayRolla though: nice writeup.
I love not having inspections or emission tests in our county.

We used to run e85 to pass older cars. Worked everytime.
__________________
1996 Toyota 4runner Limited - 4" Lift, 33's, AOR Bumper w/winch
1990 Eagle Talon Tsi- E316G @ 32psi E85 Tuned, 272 cams, ECMlink v3.0, 405whp - Gave back to Brother
2012 Toyota Tacoma DCSB - Stock on 32's- Wifes
2004 Cadillac CTS-V - 5.7L LS6 v8, 6-speed 400hp/400tq - My new DD
http://www.toyota-4runner.org/3rd-ge...read-pics.html
JayRolla is offline   Reply With QuoteReply With Quote
Old 12-07-2016, 02:26 PM #8
Scramble's Avatar
Scramble Scramble is offline
Elite Member
 
Join Date: Mar 2006
Location: Monroe, NY
Posts: 5,698
Real Name: Scramble
Scramble will become famous soon enough Scramble will become famous soon enough
Scramble Scramble is offline
Elite Member
Scramble's Avatar
 
Join Date: Mar 2006
Location: Monroe, NY
Posts: 5,698
Real Name: Scramble
Scramble will become famous soon enough Scramble will become famous soon enough
Thumbs up

Quote:
Originally Posted by shouldbeasy View Post
Sounds great!
__________________
____________

'99 4Runner - 2.7L 3RZ, 5 Speed, 4.56 Gears - Lifted, Locked & Loaded - 166k Original owner - http://www.toyota-4runner.org/3rd-ge...ld-thread.html
'99 Limited - E-Locker- Stock (for now) - 233k 2nd Owner http://www.toyota-4runner.org/3rd-ge...ted-build.html
Scramble is offline   Reply With QuoteReply With Quote
Old 12-07-2017, 06:27 AM #9
Solidaxles Solidaxles is offline
Junior Member
 
Join Date: Dec 2017
Location: Florida
Posts: 5
Solidaxles is on a distinguished road
Solidaxles Solidaxles is offline
Junior Member
 
Join Date: Dec 2017
Location: Florida
Posts: 5
Solidaxles is on a distinguished road
Hello. I have just a couple of questions concerning this mod.
If the cat is bad and being deleted, and you modify the rear 0-2, do you need to put it back in the pipe? I'm thinking you could just put in a straight pipe and tape/tie up the 0-2 to the top of the fame or something.

Also, let's say you delete the cat. Does this 0-2 mod need to be done before the cat is deleted, or can you drive a short distance after the cat is gone, then do this mod?

A friend is letting me use his garage and welder and just wanted to know if I could wait to get home after the pipe work is done to mod the 0-2.

Thanks
Solidaxles is offline   Reply With QuoteReply With Quote
Old 12-07-2017, 10:18 AM #10
audiness's Avatar
audiness audiness is offline
Senior Member
 
Join Date: Oct 2010
Location: Charleston SC
Posts: 1,140
audiness is on a distinguished road
audiness audiness is offline
Senior Member
audiness's Avatar
 
Join Date: Oct 2010
Location: Charleston SC
Posts: 1,140
audiness is on a distinguished road
Don't forgot to sell your old cats to the scrap yard, they are worth at least $100 each .
audiness is offline   Reply With QuoteReply With Quote
Old 12-07-2017, 10:39 AM #11
trailbikerider's Avatar
trailbikerider trailbikerider is offline
Member
 
Join Date: Jul 2016
Location: Kalamazoo, MI
Age: 29
Posts: 449
Real Name: Blake
trailbikerider is on a distinguished road
trailbikerider trailbikerider is offline
Member
trailbikerider's Avatar
 
Join Date: Jul 2016
Location: Kalamazoo, MI
Age: 29
Posts: 449
Real Name: Blake
trailbikerider is on a distinguished road
I may be doing this, I keep getting a P0420 code rearing it's ugly head.
__________________
2006 Tundra DC 4x4 - Daily Driver
2002 Ford Focus ZTS - Toy (Vortech Supercharger, Ksport Coilovers, Team Dynamics Wheels etc etc etc)
trailbikerider is offline   Reply With QuoteReply With Quote
Old 08-31-2018, 01:00 PM #12
Turbomk3 Turbomk3 is offline
Junior Member
 
Join Date: Sep 2014
Location: Bronx, NY
Posts: 12
Turbomk3 is on a distinguished road
Turbomk3 Turbomk3 is offline
Junior Member
 
Join Date: Sep 2014
Location: Bronx, NY
Posts: 12
Turbomk3 is on a distinguished road
Great Write up

I live in N.Y. and we have Emissions test annually over here, my truck is 20 years old with 280k on the dash, she runs but falling apart lol and I don't want to put a $1000 into it.

I tried this cat delete and O2 simulator, I passed my emissions test this morning.

Great Write up.

Thank you
Turbomk3 is offline   Reply With QuoteReply With Quote
Old 09-03-2018, 09:52 PM #13
Robb235's Avatar
Robb235 Robb235 is offline
Member
 
Join Date: Jun 2011
Location: Atlanta / Chattanooga
Age: 33
Posts: 956
Real Name: Robert
Robb235 is on a distinguished road
Robb235 Robb235 is offline
Member
Robb235's Avatar
 
Join Date: Jun 2011
Location: Atlanta / Chattanooga
Age: 33
Posts: 956
Real Name: Robert
Robb235 is on a distinguished road
Looks to be the $5 RadioShack O2 simulator. Even has the diagram I drew in MS Paint several years ago, lol.

http://www.toyota-4runner.org/3rd-ge...ator-%245.html


Sent from my iPhone using Tapatalk
__________________
1999 Toyota 4Runner Limited 4x4 - 231mm Tundra Brakes - B&M 70264 Transmission Cooler - Monitoring ATF Temps and AFRs With My iPhone - Lifetime LED Headlights - Cooper Discoverer AT3 - OME 906 Coils & Rancho 9000XL Shocks (Rear) - Airlift 1000 - RadioShack $5 Rear O2 Simulator
2003 Yamaha R6 - My speed machine

Robb235 is offline   Reply With QuoteReply With Quote
Old 04-12-2020, 09:46 PM #14
kmrod22 kmrod22 is offline
Junior Member
 
Join Date: Apr 2020
Location: Los Angeles
Posts: 2
kmrod22 is on a distinguished road
kmrod22 kmrod22 is offline
Junior Member
 
Join Date: Apr 2020
Location: Los Angeles
Posts: 2
kmrod22 is on a distinguished road
Did this on mine but am now getting a p0141. Did it exactly as this poster has it pictured. Suggestions. I have a 2000 3.4 of course. The front cat is still intact, the secondary housing is in place but gutted. It throws the code as soon as I start it. It will run fine until it comes up to temp and then starts surging under consistent throttle application. Any help would be appreciated.
kmrod22 is offline   Reply With QuoteReply With Quote
Old 04-12-2020, 10:25 PM #15
jgue467's Avatar
jgue467 jgue467 is offline
Senior Member
 
Join Date: Sep 2011
Location: Austin, Texas
Posts: 2,755
jgue467 has a spectacular aura about jgue467 has a spectacular aura about jgue467 has a spectacular aura about
jgue467 jgue467 is offline
Senior Member
jgue467's Avatar
 
Join Date: Sep 2011
Location: Austin, Texas
Posts: 2,755
jgue467 has a spectacular aura about jgue467 has a spectacular aura about jgue467 has a spectacular aura about
why do folks what to FUKK UP the air without a cat???
__________________
2001 Limited 4WD - 328K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL, ZERO RUST - StopTech ANGLED rotors - Magnefine trans filter - In series trans cooler, ORIGINAL: paint, engine, 4wd, trans, mstr cyl & brake system, rear axle seals, A/C, steering pump, steering rack, front/center/rear diffs, all electric motors, seat heaters and so on. WooHoo!!
Oh yeah, GO LONGHORNS!
jgue467 is offline   Reply With QuoteReply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear Wiper - To delete or not delete? SpidermanGeek 3rd gen T4Rs 3 01-29-2015 09:53 PM
fs 3rd gen oxygen sensor simulator, nj, $50 marzox17 For Sale: T4R Items 0 08-25-2014 11:11 AM
U.R.D. simulator on the way T4Rscott 3rd gen T4Rs 4 02-09-2012 12:46 PM
Rim Simulator Turn_down General Discussions 0 05-22-2011 08:42 PM
Toyota Driving Simulator IntoTheVoid General Discussions 1 03-13-2010 07:48 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 05:07 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020