Bad Catalytic Converter, how to remove and disable light?
07-17-2015, 12:19 AM
#11
Ask a sales person at that same dealership if they will buy your truck without the cat installed when you are ready to trade it in. Then tell them one of their mechanics recommended that you have it removed.
Let us know what that sales person said.
And to Austin Ormond, can you explain how a two spark plug anti foul inserts are going to turn off codes from the ECU/PCM when it does not get a reading from the missing O2's they are replacing?
Let us know what that sales person said.
And to Austin Ormond, can you explain how a two spark plug anti foul inserts are going to turn off codes from the ECU/PCM when it does not get a reading from the missing O2's they are replacing?
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Tsttoozinkd (07-15-2023)
07-17-2015, 01:21 AM
#12
You don't need a tune to turn off the check engine light if you remove the converter. All you need is $5.00 worth of electronic parts and about 10 min. If you don't want to make your own look up MIL eliminator.
Also removing the cat will not make the exhaust crackle and pop, the most it will do is make it a little louder provided everything else is factory.
If the cat is bad and restrictions flow I would certianly get it changed or removed as it will eventually create problems up stream.....burnt valves, excessive under hood temps, etc.
Also removing the cat will not make the exhaust crackle and pop, the most it will do is make it a little louder provided everything else is factory.
If the cat is bad and restrictions flow I would certianly get it changed or removed as it will eventually create problems up stream.....burnt valves, excessive under hood temps, etc.
07-17-2015, 02:14 AM
#13
LightningRod
You guys been watchin' too many YouTube videos. Where is this "clean air" supposed to come from, besides who says "clean air" is the prescription to cure "Catalyst Efficiency Test" failure. Clean air can better be accomplished by wrapping the O2 sensor around the brake cable and plugging the hole in the exhaust. But a P0420 code is only a symptom. Doesn't mean the cat is not doing its job. The symptom can be caused by various other things out of spec but that haven't set their respective codes yet - and those causes should be explored and remedied before MASKING the problem.
A small exhaust leak upstream, or a vacuum leak, will cause the ECU (before setting a too lean code) to drive fuel trim sky high, (degrading your fuel economy) and swamping the catalyst system making it difficult for the ECU to effectively momentarily richen fuel air mixture and measure the amount of time it takes for the cat to react and burn off excess hydrocarbons and for the downstream O2 sensor to return to proper fuel/air mixture (lambda). (Ie. fail realtime catalyst efficiency test). The opposite scenario can happen with faulty EGR or MAf, among other things, when the ECU momentarily leans fuel air mixture and measures the amount of time it takes for the downstream O2 sensor to register the change. Repeated failure = same result, a P0420.
As for the electronic device. Sure you can fool anybody or anything, but catalyst efficiency is a continuous realtime OBDII test and you are fooling yourselves, not the ECU. When the misfires start showing up, or other underlying problem gets serious enough to show its ugly face, you can address THAT DTC then.
If goofing with the design of your O2 sensor mount or electronics cures a P0420 code (????.....), it not only violated Federal law as @BucKo said, it also did nothing to FIX the underlying cause and it certainly did not improve the efficiency of the cat. The ultimate result will be destroying the CAT.
A small exhaust leak upstream, or a vacuum leak, will cause the ECU (before setting a too lean code) to drive fuel trim sky high, (degrading your fuel economy) and swamping the catalyst system making it difficult for the ECU to effectively momentarily richen fuel air mixture and measure the amount of time it takes for the cat to react and burn off excess hydrocarbons and for the downstream O2 sensor to return to proper fuel/air mixture (lambda). (Ie. fail realtime catalyst efficiency test). The opposite scenario can happen with faulty EGR or MAf, among other things, when the ECU momentarily leans fuel air mixture and measures the amount of time it takes for the downstream O2 sensor to register the change. Repeated failure = same result, a P0420.
As for the electronic device. Sure you can fool anybody or anything, but catalyst efficiency is a continuous realtime OBDII test and you are fooling yourselves, not the ECU. When the misfires start showing up, or other underlying problem gets serious enough to show its ugly face, you can address THAT DTC then.
If goofing with the design of your O2 sensor mount or electronics cures a P0420 code (????.....), it not only violated Federal law as @BucKo said, it also did nothing to FIX the underlying cause and it certainly did not improve the efficiency of the cat. The ultimate result will be destroying the CAT.
07-17-2015, 01:59 PM
#14
Mark
iTrader: (1)
Yeah.. What Torqued said !!
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CHICKS (09-18-2016)
06-21-2022, 07:23 PM
#15
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5 people spouting off for about laws when the guy asked about converters
Before you remove the cat and replace it with a straight pipe, be sure you completely understand that its a FEDERAL law that states you cannot tamper with this equipment. Its also a FEDERAL law that prevents you from selling or trading in a vehicle with any of its FEDERALLY mandated equipment removed. Each state has its own state laws as to how its punishable if you were to sell it privately or to a dealer. In Florida, trading a vehicle in requires you to sign (at the time of trading it in or selling to a dealer) a paper that the FEDERALLY required equipment in place.
Folks here are only trying to help you save some tr down the road.
And to answer your question about the check engine light, yes, it will set a code. A tune can be installed (provided you have a tuner) that can "bypass" the O2 sensors from the ECU/PCM.
By the time you buy the tuner and custom tune to do this, an aftermarket cat could be welded in by a muffler shop for close to this cost. Shop around.
Folks here are only trying to help you save some tr down the road.
And to answer your question about the check engine light, yes, it will set a code. A tune can be installed (provided you have a tuner) that can "bypass" the O2 sensors from the ECU/PCM.
By the time you buy the tuner and custom tune to do this, an aftermarket cat could be welded in by a muffler shop for close to this cost. Shop around.
11-05-2023, 05:16 PM
#16
Geez is this site full of Karens or what.
Cats protect the environment at the expense of choking your truck. If the guy wants to save a couple grande and straight pipe his truck, power to him.
Cats protect the environment at the expense of choking your truck. If the guy wants to save a couple grande and straight pipe his truck, power to him.