The first O2 sensor is located before the Catalytic Converter. :thumbdown: You drill out the defouler. Versus. - Gen III and IV Small Block & Drivetrain - GM-Trucks.com. Go into ebay/amazon sand they run $10- $15. The thread for all O2 sensors is 18 x 1.5mm. Thanks, Dan. This usually tricks the o2 sensor into believing the cat is working correctly. To make the whole setup easy to remover, it is useful to use or apply an anti-grab product on the strand. What size tap do you need for O2 sensor? Location. Just install them in between the o2 and bung, make sure the sensor cage on your o2 clears the bore of the anti-fouler or you may need to drill it out slightly. called a spark plug defouler on the pre-cat o2 in order to not have a bad air-fuel mixture. AltezzaBob said: you actually need 2 foulers. The car has a room for either 1 or 2 spark plug non-foulers. www.ebay.com FYI I got $585 for my cats at a scrapyard! 3. The whole purpose of this O2 sensor is to ensure that there is a functioning catalytic converter in the system. Its a easy to install, simply tighten by hand without any tools. What is an O2 Defouler? 2, you should consider replacing the O2 sensor, now. Home; Forum; FAQ; Calendar; Forum Actions. The answer to your question depends on the downpipe/midpipe you're going to be using and the bung size and thread pitch on it. SELECT STORE. Reactions: VSPro9. 42009 (they come in a pair from AutoZone for about $3.99 to 4.99) - 22mm or 7/8" wrench or Oxygen Sensor socket (7/8" deep well socket) - wd-40 or some kind of rust penetrate Step one You will need to grab one of those Spark Plug Non-Foulers you just bought. FREE Shipping by Amazon. Using a defouler vs replacing the O2 sensor are solving 2 different problems. After successfully locating the sensor inside the spark plug non-fouler, screw it to the tight on the crest of the original. Dorman 42002 buy 2 sets of two. No drilling or "spark plug defoulers" necessary. When finished this is what it will look like. The second O2 sensor is located after the Catalytic Converter. 1999-2013 Silverado & Sierra 1500. Thanks to all for posting the on the cheap fix. What this does is it moves the O2 sensor further away so only a limited amount of exhaust gets to the O2 sensor, it is a VERY little ammount that actually gets to the sensor but as long as it . Thread starter Austin-591500; Start date Feb 16, 2021; 1; 2; Next. Check if this fits your vehicle. It would throw a code every once in a while for me even with adjustment. It is designed for spark plugs with 18 mm thread size. A defouler is an aftermarket component that can trick the O2 sensor by creating flow for fuel vapors, even if the spark plugs are dirty. O2 sensor defouler is a very effective tool for avoiding Check Engine Lights(CEL). it has worked and have gotten no CEL's from it. One option is to use some spark plug defoulers to set the o2 sensor out from the exhaust a few inches. Thread the rear oxygen sensor into the one you just hollowed out, and thread that mess into the other defouler, and thread that into the bung. Following the actions below after properly identifying the sensor within the anti-fouler spark plug: 1. . Sensor #2 heater is bypassed with a big powerful resister that does the job perfectly of making the ecu think the sensor is in place. Tools needed: - 7/8" wrench or 02 remover wrench. Mar 7, 2009. 0. 2. SKU # 720789. Universal Exhaust Items - Vibrant Oxygen Sensor Defouler. My car hasn't had a cat for over a year now and never had a p0420. I had the light when i put my hiflow cats in and when I deleted the secondary cats the ses light went away. Mark Forums Read; Quick Links. For Chrysler 1994-87, Chrysler 1976-64, Ford 1996-55, and Unclassified 1960-58. . If you have issues with the way the car runs, it could be the sensor shorting out inside the casing. Spark plug non foulers, trick O2 sensor. Ledaut Catalytic Converter O2 Oxygen Sensor Bung and Plug Notched Style(8 Bungs/8 Plugs) Oxygen Sensor Stepped Weld Bung M18X1.5. Drill one out with 1/2" drill bit and you have too shave just a tab more then 1/2" too fit the rear O2 sensors in. You would have to match one by size to what is on your 2005 Ford F-150 5.4L that can be fabricated into its place. M18 x 1.5 Thread For All Standard O2 Sensors. I had to hammer the driver side frame, just a little, near the sensor because it was to tight to get everything in. Part # 42002. The defouler will trick your working O2 sensor into thinking your cat is not bad by moving it out of the direct exhaust flow. The defouler screws onto the spark plugs and acts as a sleeve, creating room for vapors and preventing spark plug damage. $629. this should work on 99 to present and is 100% revesable. hope that helps 10-08-2014 10:49 PM #9. ou2mame. Do a little research, you will find multiple threads of using a spark plug defouler to add onto the O2 sensor to remove the P0420 code for a check engine light. one to plug into the header, another that that will fit the o2 sensor and that has an end that has a small hole at the end of it so that the exhaust fumes can hardly get to it. - 2 sets of 2 18mm Spark plug non-foulers (NF for short) Napa part # 730-2442 About $7 a pack. 4.7 out of 5 stars 882. That way, the exhaust will have to flow through the same materal it does when the cats are there. Apply an anti-grab substance to the strand to remove the entire arrangement easier. S. Titan1969. . 2. Not only can no one tell you what to get unless you have more info about the downpipe, but my experience has been that those O2 non-foulers are worthless. The first step is to fit the sensor. Joined Sep 20, 2021 Messages 577 Location denver. The defouler was so so for me. Well I was about to purchase the same ole defouler.however I came across this. I just replaced the engine, and a 9 year old cat back system on a 99 S10 4.3 4X4 PU. 2001 1500 sport with a 5.9. . Then, take a pair of spark plug defoulers (around $.50 from Autozone, Advanced) and hollow one out with a 1/2" drill bit. Your only solution to getting a P0420 DTC on the newer cars is to disable it in the tune. Thread starter a c i d.f l y; Start date Sep 29, 2017; Watchers 2; a c i d.f l y Senior Member. Bought the same ones found in the "piggies DIY". Screw Spark Plug & Unscrew Sensor. take that part, and size it to whatever they have for defoulers. You are using two non-fouler to increase the . o2 sensor defouler/fooler. If you check the "Pending DTCs" and you see the P0420 there, then it's definitely considering re-issuing the DTC and kicking the light back on. Posts. $32.99 $ 32. I installed two defoulers per rear o2 sensor. 2 things. - 18mm Spark Plug Non-Foulers Part No. Spark Plug Non-Fouler helps to protect spark plugs from damage,High-quality steel construction for long-lasting durability,Corrosion-resistant design,Gaskets included (where applicable),Tapered seat style,Th . Direct replacement - this spark plug non fouler is designed for easy installation to protect . 99 ($4.12/Item) Get it as soon as Wed, Aug 31. . This Dorman Spark Plug Non-Fouler - Part # 42009 is universal and is not application specific. A clogged spark plug will prevent healthy combustion and may cause problems when . I think it had to do with how it was . 2,546. You now need to drill out 1 of the non foulers using a 1/2" drill bit. May 24, 2008. Price: $3.50 for 42009 and $3.50 for 42002. Avoid Check Engine Light (CEL) 90 Degrees To Extend O2 Sensor For Better Clearance. How to use a sparkplug antifouler to turn off you Check Engine Light. . They have a close tolerance on the inside of the casing. La Junta Colorado 81050. It is engineered for durability and reliable performance. If so, you should weld 2 oxygen sensor bungs in, a few inches apart. Install your 02 sensors as followed: O2 sensor, modified short fouler, long short fouler. Thread Size: 18 mm. o2 sensor defouler 90 degree Fullsize Truck & SUV - 1999-2006 GMT800 & 2007-2013 GMT900 Platforms. Just ordered a set. Dorman Spark Plug Non-Fouler 42002. View Profile View Forum Posts View Blog Entries View Articles . The other possible outcome is that you'll have a P0420 code (or a code for an O2 sensor issue) return. The use of a spark plug non-fouler messes with the . This simple trick will pull the O2 sensor away from the exhaust flow and make your car . Summary: DO NOT USE O2 SENSOR SPACERS OR SPARK PLUG ANTI-FOULERS ON 2005 OR NEWER SUBARUS. Simply Install and Tighten By Hand Without Any Tools. they are meant to pull spark plugs out of the head a bit to stop oil from fouling them if you have dodge piston rings, but they also work for pulling the rear o2 sensor out of direct line of the exhaust gas, so if you have a decat it will stop throwing the . Dan Osier said: 18mm is the standard for O2 sensors. M18x1.5mm DORMAN 42002 Spark Plug Non Fouler HHO Anti Fouler Dry Cell Nonfouler | eBay. Spark Plug Non-Foulers; 18mm Tapered Seat; This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. There are specific adapters made for screwing into O2 sensors for defeating that trouble code. Remember Me? Find many great new & used options and get the best deals for FORTLUFT 4401122 O2 Sensor Defouler 90 Degree at the best online prices at eBay! I did this, but I think I damaged my o2 sensor in the process, because then it started throwing a P0141, which means the o2 sensor heater is bad. Sure beats spending 1000 on . Also, it's worth noting that you can't use electronic "MIL Eliminators" like the ones from Pony Express on 2005 and newer Subarus either. Im thinking keep it simple stupid and buy the same one I had before.the second one. Standard size, 18mm spark plug thread is the same. It took a 1/2" bit to drill out the defoulers that you install the sensor into. Now, carefully detach the stock sensor, place the cell stick in, and again . The honey come will need to fit into the bottom undrilled spark plug spacer. Have a check engine light in your vehicle for cat efficiency codes due to not having a catalytic converter on your car? Reaction score. how to trick that pesky o2 sensor. Just google search an o2 defouler and it'll pop up So if you want to install more than a single spark plug have an electric drill machine nearby. Joined Sep 25, 2017 Threads 21 Messages 693 Reaction score 352 . 1, it's a non-fouler, not a defouler. Re: How-To: Install An O2 Sensor Non Fouler to Eliminate a Check Engine Light with Pi Hi Guys. CraftsmanQuad19 wrote: Mon Mar 14, 2022 4:40 am They sell actual o2 defoulers that bolt right on specifically for this purpose. Modify the short spark plug non-fouler (P/N 42009) to make the hole bigger in order for the oxygen's sensor tip to fit comfortable inside the spark plug non-fouler. View Site Leaders does anyoe know what size i should get or are they universal? Exhaust - Vibrant Tunable Oxygen Sensor Defouler Kit. Aug 9, 2011. Buy a spark plug that is at least eighteen mm size. If you . Tighten it on the original's crest. Step 2: Remove the sensor and replace the spark plug. How To Program O2 Sensor Delete? Sent from my DROIDX using Tapatalk. This O2 sensor is responsible for all the Air/Fuel tuning and is imperative to the operation of the vehicle. Tried the Dorman spark plug defoulers but the thread pattern is different between the defoulers and the O2 sensors. Free In-Store or Curbside Pick Up. That allowed the sensor to fit nicely into the defouler. 0. Aug 3, 2012. Detailed Description. 1 of 2 . Yep, m18 x 1.5 is right. for those who want to run "catless" this is what needs to be done to keep that pesky Check engine light off. If your cat is bad, a new O2 sensor will throw the same code. Sent from my SM-G965U using Tapatalk. J. jiggletits. A easy way to do it is to use some 18mm washer seat spark plug anti-foulers, you can get them at any auto parts store. You don't drill the O2 sensor!!!!! Standard Delivery. A non-fouler adapter for a big block Ford (360/390) would work. These are the simplest and best way to install a Spark Plug Non-Fouler. The ECU is still not looking for the downstream o2 sensor signal though it obviously needs the heater circuit. so, o2 sensor->1st plug fouler->2nd plug fouler->header. Th. All Activity. The O2 sensor still sees the same exhaust gas as it would if . You have to drill out the top SP non fouler with a 1/2 drill bit, so that the o2 sensor will fit into it. Spark Plug Non Fouler PN 42009 . If hes gona delete the primary might as well delete the secondary as well this might eliminate the ses light. Free shipping for many products! Home Delivery. The O2 sensor #1 is putting out appropriate voltage. StrokerAce03.