Good vs bad catalytic converter. Can someone tell me what is the smoking gun indicator that i have a bad O2 sensor OR a bad cat converter. Decrease in Gas Mileage. Your car or RV can and will function without a catalytic converter. The Ford F250 (similar to the Dodge 2500 in terms of towing and strength) is a mere $2,804. However, when it comes to catalytic converter thefts, thieves spare no one. Well, the reason is the higher amount of precious metals in the OEM converters than the aftermarket converters. If not, if the O2 sensors get damaged, then the catalytic converter will also get damaged. They’re located between the engine and the muffler, usually closer to the engine. Use an infrared thermometer to measure the temps of the piping just before and just after the cat at idle. The additional issue would be that the convertor would stop working first. 2. The ECM of the sensor will decide the air mixture entered in the engine is rich or lean. This signal can also be viewed by graphing the sensor outputs in current data on the scantool. 2000 MR2 - Stock 1ZZ - 2200Lbs - 260hp=fragged 5MT. According to the amount of oxygen in the exhaust stream. The lessened workload allows the engine to function easily which also leads to a lesser fuel consumption and a . Save. Most catalytic converter failures fall under one of three categories: Overheated, melted or broken . How Much Do Diesel Catalytic Converters Cost to Repair/Replace. And it is the first symptom of the bad catalytic converter symptoms. According to the p0300 code, at least two or more cylinders encounter misfiring. Back pressure can also cause an engine to stall when driving or not accelerate immediately when the pedal is . If your catalytic converter is on its way out, you’ll likely experience symptoms of the impending problem before it goes. It means your engine is experiencing intermittent misfires. You can use an Ohm meter for it. If you didn't know, these cars will display Hard codes (SES) and soft codes, which dont trigger the SES. It will keep your check engine light off, and it is 50 state legal. Whenever a DTC code, p0300 code appears on your troubleshooting appliance, it signifies that your car’s computer spots engine misfires. If you just had an oil change, and your gas tank is full to the marked level, yet your engine seems to be misfiring, that’s a call to check your catalyst converter. Acceleration is sluggish: A whole other issue that catalyst converters commonly cause is a lack of acceleration. 7 to one air-fuel ratio). This is a sign of a clogged catalytic converter. For that reason, we have thoroughly examined the top 3 catalytic converter cleaners that are available, at least as of the writing of this article in 2021. Unfortunately the symptoms of a bad catalytic converter are very similar to the symptoms experienced for numerous other engine problems. Can a Bad catalytic converter cause a p0300 Code? Maybe your car’s check engine light illuminates with the dreaded p0300 code. This equates to 5200 thefts a month! Also, what vehicles have the most valuable scrap catalytic converters? The next most expensive catalytic converter is a bit closer to home. If you observe delays when accelerating or a decrease in power when driving in steep areas, while all other parts like spark plugs, filters, sensors, etc. Step 1: Mix 2 tablespoons of dish soap and water in a large plastic bucket. They will fit some better then others depending on your application. They went over everything from the exhaust manifold bolts down to the muffler hanger and he did not find anything [extremely] obvious as the culprit. 2 percent to 2. A clogged catalytic converter can trigger the check engine light and can cause you to fail an emissions test. The main benefit of an aftermarket catalytic converter is money. Drive the car for 15minutes to get the main cat up to temp. It is all resolved now but i wonder if this all contributed to killing my cat converter. Random misfires happen for a variety of causes. The parts cost alone will be anywhere from $1,100 to $1,500 for the converter component. Technically, you can drive with a bad catalytic converter as long as you want. The symptoms of a bad O2 sensor and a catalytic converter are the same. 2011-08-04T14:23. One quick and easy test is to connect a vacuum gauge to a manifold vacuum port (like the one feeding the brake booster). . 5 Your old converter while bad is still probally worth big $$$. The mechanics we spoke to said the most targeted cars for catalytic converter thefts are “regular” cars that common folk drive. Let’s see some catalytic converter symptoms. Lastly, you can use high-octane fuel and additives to clean your catalytic converter. At this temperature, a chemical reaction happens where the dangerous gases are filtered by the cat, and safer compounds come out like water, oxygen, and carbon dioxide. Over the years Chrysler vehicles have had their share of quality problems. A leaky exhaust valve can do the same thing, allowing unburned fuel to pass right through the engine without being ignited. I replaced my replaced Catalytic Converter and after about six months, the check engine light went on. If the unit is made directly into the exhaust manifold measure the top of the canister or the upper portion while not getting the manifold itself. Good thing, too, because this auto part uses rare, precious and therefore expensive metals such as gold, palladium or rhodium. However, if your catalytic converter isn’t working, you should probably . However, you don’t have to replace the catalytic converter when replacing O2 sensors because a damaged catalytic converter will not affect the . If the converter is plugged, contaminated, damaged or rusted out, it must be replaced. Put an OBD reader on and watch the two oxygen sensor readings. Fuel Economy will drop: Catalytic as effective as they are at lowering emissions, converters can . Take the temperature readings at the front and rear of the catalytic converter. Originally Posted By: southernjeeper. Additionally, you will also fail in your emissions test and unable to get the renewal of registration. The cost difference is largely due to the presence of valuable metals like rhodium, palladium, and platinum in the catalytic converter, which would make it expensive overall. Catalytic converter test. Outside of a rattling noise within your exhaust and a bad exhaust smell, there are two methods for diagnosing a bad catalytic converter. The cleaning solution should be foamy and rich. It has a table that is E39 M5 specific, vs. Difficulty Starting. There are other signs and symptoms you will notice. Is there any problem with the Engine. Symptoms associated with a bad converter include: Engine misfires, 4 Aftermarket converters will work just fine and are less expensive but they are rarely a good fit. Let the cat sit for 20 minutes or longer so the chemicals have time to work. That equates to a 1. As hinted above, a bad catalytic converter doesn’t only make a rattling noise. First, make sure the engine is up to operating temperature. The catalytic converter can overheat and show signs of failing when the engine misfires. Engine misfiring: The catalytic converter can overheat and it may result in the engine misfiring. Today the latest vehicles seem to be much more trouble free. On average, the cost to replace the catalytic converter will be anywhere from $1,230 to $1,670. This test is done directly at the exhaust system; to detect a plugged catalytic converter or muffler or pipe. The Heat Myth. With Sodium Hydroxide. Some common signs of failure are: Rough performance: If exhaust gasses are having trouble getting through, your intake is also suffering, which means the whole system might not be getting the proper airflow it needs to run smoothly. Between January and May 2021, car thieves stole almost 26,000 catalytic converters in the United States. 00 per Gram (market prices constantly change). 1 1. Originally Posted By: L_Sludger. How long do Magnaflow catalytic converters last? When you get one, remember that Table 18 is the 1st code that will be displayed and is the table you use exclusively for our cars. temperature should be more after cat . The Dodge Ram 2500 comes in at $3,460. I saw a video on youtube it said. When a catalytic converter is working properly, it will be 100º F hotter at the outlet than it is at the inlet. An aftermarket converter will keep your check . I went to get it checked and it says the Catalytic Converter is bad. ) claiming that you can find out if your catalytic converter is bad by checking the temperature (using an IR thermometer) of the cat (close to the O2 sensor) and the pipe before (close to the engine) and after the cat. The average cost to repair a damaged diesel catalytic converter for most vehicles is between $900 and $2500 including parts and labor. With all the above being said and you still want to just toss our recommendations out the window, then by all means, go and buy new CATS. Either fault can negatively affect engine performance and cause a reduction in power and acceleration as well as fuel economy. An O2 sensor "makes" voltage. The stinky sulfide is meant to be converted into odorless sulfur dioxide by a catalytic converter. If you usually use low octane fuel, try high octane a few times and you may notice an improvement. They assist in maintaining the proper air-fuel ratio for proper and efficient combustion. Effects of driving with a bad catalytic converter. There are some types of gasoline that contain sulfur. Today’s rhodium price is $218. For the GOOD CATALYST 4. I talked to a guy from the manufacturer and he was a mechanic for over 30 years and he said there could be more going on than just the cat and if I want that one replaced, I would need to do a full diagnostic. Rattling noises from under the vehicle are another symptom of a bad or failing catalytic converter. Check the system from the intake manifold to the exhaust manifold. That means you should replace a faulty catalytic converter as soon as possible. That's not to say the cat hasn't gone bad, but you should go through more diagnostics before concluding that. Also, a defective oxygen sensor can result in overheating. A good fix for P0420 is a couple of spark plug anti-foulers screwed into the post-cat O2 sensor bung, with the O2 sensor screwed in at the end. 9 percent O 2. Step 1. If your vehicle has any of these warning signs, then your old catalytic converter may need to be replaced. 2 2. Decreased Acceleration. The temperature test, using an infrared thermometer. This is nearly half the cost of the nationwide average of $2100. Generally $40 - $150 depending on the size and how bad it is damaged. 12 Signs Of A Bad Catalytic Converter In Your Car Since the very first gas car back in 1886, cars have been improving at a steady rate. Most converters are designed to operate at a temperature of 800 to 1600 degrees F. It sounds like Canada has laws very similiar to us here in California. Catalytic converters contain rhodium, palladium, and platinum. Check engine light: If you have a 1996-or-newer (OBDII) vehicle, a check engine light may indicate a problem with your catalytic converter. If the code indicates a bad catthen further tests need to be run to determine if it’s a bad O2 sensor or a bad cat. 2 percent standard and indicates a bad converter. temperature before catalytic converter was 315 F while temperature after it was 300. The green trace comes in at . The blue trace would indicate a bad catalytic converter. And i certainly dont want to pay a fortune to replace the cat converter if it isnt needed. I personally emailed Shell and I got this response, "We do not recommend Rotella T6 for engines with catalytic converters. 63 per Gram, palladium is priced at $59. Related Post: Can a Clogged Catalytic Converter Cause Rough Idle? How to Spot a Failing Catalytic Converter. In most cars, you can find it under the vehicle. Next, I would replace the Pre-CATS, drive then see if you throw a code. The sulfur-containing fuel turns into hydrogen sulfide. Many manufacturers have started to remove those additives to extend catalytic converter lifespan, but it turns out that those same additives are very good at protecting the engine. Answer: Most certainly. Rotten Egg Smell Coming From the Exhaust. Remove the O2 Sensors. Under normal conditions, when your catalytic converter is working properly, the hydrogen sulfide is converted into odorless sulfur dioxide. Now, let me repeat #2. Once your catalytic converter goes bad, you will need to prepare yourself for the expense of replacing it. There are many reasons behind misfiring. if temperature is more before cat than most likely its clogged converter. 1 percent. Buy a Peake Code reader. Your vehicle is misfiring. In a good catalytic converter; the rear of the converter will be, 20 degrees hotter than the front. This ignition is what causes the misfiring sensation – and that can destroy engine components. It may mean a very rich unburned fuel mixture is entering the catalytic converter. Anytime your vehicle misfires, you should have it checked out by a reputable service professional. Warning signs of a bad catalytic converter. The catalytic converter buffers oxygen in the exhaust stream, so the downstream sensor reading should stay relatively steady while the upstream can move around a good bit. 34 per Gram, and platinum is worth $25. Other causes include: A malfunctioning oxygen sensor, Unburned fuel, or. Check Engine Light. How to tell if you. ‘. A diagnostic scan tool plugged into the OBDII port . This simple test, requires a back pressure gauge. Then run the engine at about 2,000 to 2,500 RPM. Likewise, if the OBD II system is showing low catalyst efficiency, the converter must be replaced. Ignoring a loud, clattering sound from your car is never a good idea, and often this can be a problem with the catalytic converter. Moreover, when one or two vehicle components are leaking, they could ground the . Zero to One volt, on a factory system. Using a Vacuum Gauge. Its oxygen level rose from . Bad Smell Coming Out from the Exhaust. Probably, you have noticed the larger physical size of the OEM catalytic converters. Though after driving it for 50 some odd miles the check engine light came back on and is showing the code . Another classic symptom of a failing or clogged catalytic converter is reduced gas mileage. This is why it is important to identify the root cause of the failure and perform the repair prior to installing a new converter. The engine will no longer have to work double time to produce the same energy when the converter is still in place. However, there are significant downsides in purchasing aftermarket, and you should be aware of them before making your decision. Question: I just had my catalytic converter changed as it was bad as it had all the symptoms (bad fuel consumption, loss of power, problem shifting gears, etc) since I got it replaced the car runs perfect like it did when I first got it. The popular misunderstanding is that ethanol's 30 percent energy deficit means a 30 percent richer air-fuel ratio, which means more unburned fuel flowing through the cat; and that supposedly produces more heat, which kills the cat. To the original question: The only way the ECU knows a cat is bad by the readings it get from the O2 sensors. How to check a catalytic converter to see if it's bad and needs replacement in your car, DIY with Scotty Kilmer. 2002 Toyota Corolla S, 1. Always keep in mind that, driving without catalytic converter is totally illegal and you will pay dollar of fines for it. A bad O2 sensor will indicate that the catalytic converter is bad. Cataclean Fuel and Exhaust System Cleaner. Tools recommended for Catalytic Converter diagnosis include an oscilloscope/graphing multimeter, infrared thermometer, scantool and gas analyser. Your catalytic converter, sometimes called the cat, uses a catalyst to convert the more harmful compounds of your engine’s emissions. The price of a catalytic converter is generally more expensive than the price of a muffler. 9 percent increase, which is above our 1. Checking the O2 sensor of your car is comparatively easy. A bad cat system can directly affect the engine of modern vehicles because, in newer cars, everything is connected to a central computer. Diagnosing Converter Issues. Good mechanics know how to do this. Dark Smoke from the Exhaust. Most of the pollution modern cars emit occurs in the first couple of minutes after a cold start, before the engine and the . Step 2: Dip the catalytic converter in the bucket and allow to soak for 30 minutes to 1 hour. You will need a jack and jack stands to replace your car’s catalytic converter. Removing the catalytic converter lessens the strain on the engine due to its restricting effects. 1. A faulty catalytic converter is bad for the environment and, in some cases, it can cause engine performance problems. On a dual-cat system, the side with the bad converter code will tell you which cylinder bank to check. Catalytic converters are actually quite an important component that works as an adjunct to other vital parts and sensors in a vehicle, especially the O2 sensors. It does not occur if the system is faulty or clogged. Rattling Noise. 5. Bad fuel economy, failure of the turbo to “spool-up” where it performs its magic and possible overheating of the turbo causing coking or turning the lubricating oil into a tar like gue resulting in bearing failure (of the center section) which may damage the rotating assem. Your local muffler shop can advise you on the best catalytic converter for your car and in most cases, you can get your converter replaced for under $1000. You should see an outlet temp that’s 100º . Check Engine Lights Flashes. 8L 1ZZ-FE. Also, what vehicles have the most valuable scrap catalytic converters? The next most expensive catalytic converter is a bit closer to home. The culprit specifically is likely a clog or blockage within the converter. It includes bad spark plugs, a bad catalytic converter, and clogged fuel injectors. When this happens, the engine has to work harder to compensate, and that means more fuel is consumed. Clattering Sound in the Engine. The three precious metals make the catalytic converter a great prey for criminals to recycle. Video says pre-cat should be ~300F,a good cat should be ~500F. Fuel contains many sulfur particles that convert to hydrogen sulfide during combustion. They act as catalysts in chemical reactions that . Table of Contents [ show] 1 Bad Catalytic Converter Symptoms. Update: the owner of the shop spent a good hour looking over the exhaust with the tech the did the original repair attempt. Since precious metals catalyze the conversion process, the more amount . The answer is, technically you can! You can drive even without a catalytic converter as long you wish. Converters don’t fail on their own; failure is usually a symptom of a larger problem. This is practically the first sign of a bad or failing catalytic converter. After the exhaust system and cat converter has been heated point the infrared temperature meter at the incoming exhaust pipe as it enters the housing. A clogged converter will restrict exhaust flow, while a cracked one will leak harmful gas. A bad catalytic converter will be unable to convert the hydrogen sulfide, so it will come out of your exhaust unprocessed, smelling like rotten eggs - a very objectionable odor. Catalytic converters are part of the exhaust system. While the first part is true, the richer air-fuel ratio won't affect converter temperature any more . general "Bad Catalytic converter" code. A bad catalytic converter will be the reason if the engine responds slowly or stops functioning after a while. A fouled spark plug, bad plug wire or a bad coil on a DIS system causes ignition misfire that overloads the converter with fuel. To operate efficiently and travel light, the engine requires a good flow of emission. Regarding your van heater fan, this is a likely a simple . Catalytic converter problems cause gas within your engine to heat up to the point that it actually ignites. In a nutshell: A catalytic converter works by using catalysts to transform your car's toxic gases into relatively harmless ones. The delta on a healthy cat should be 80-100F* much less and its the cat causing the PO420. Engine Misfiring. However, no car is perfect, and thanks to ever more rigorous emissions regulation, cars have become extremely. Check it out here! As far as we know, Cataclean is the only patented catalytic converter cleaner on the market. An aftermarket catalytic converter can save you over 80% on the price of a new one, costing less than $200, and sometimes as low as $60. A catalytic converter can overheat due to excessive amounts of unburned gas, which may be caused by a leaky exhaust valve or a misfiring spark plug. The truth is, on modern vehicles, the catalytic converter should last the life of the car or truck, given an "average" life of about 100,000 miles (160,934 kilometers). Other Ways of Diagnosing Catalytic Converter Failure. Because a bad converter can restrict airflow of the engine’s exhaust, this affects the car’s fuel economy. Typically, a combustion engine emits numerous harmful compounds. Many aftermarket catalytic converters can do the job at a fraction of the cost. Here's where it gets interesting: The precious metals palladium and platinum are smeared onto your catalytic converter's matrix. Better gas mileage. And it might be the reason for the lower cost of the aftermarket converters. A clogged fuel pressure gauge or a fuel injector can cause a malfunction in the engine as well as the catalytic converter. YES, when replacing a bad catalytic converter, it is recommended that you replace the O2 sensors as well. When the converter isn’t working properly, it can mean the engine isn’t getting the oxygen that it needs to work most efficiently. The check engine light is the easiest to diagnose. Poor maintenance. Step 3: After soaking, remove the unit from the bucket and rinse off the excess soap with clean water. Now that's a sweet idea! It pushes the sensor up and out of the exhaust stream. Many of the additives in motor oil and supplemental motor oil additives, tend to kill catalytic converters very quickly. The condition is dangerous as the fuel may ignite within the convertor which can melt the catalyst components. The next thing to check is the engine of your vehicle. The catalytic converter is not exactly a cheap device. Tells the computer if the car is running rich or lean, so the computer can control the fuel injection (or CCC carburetor) to a stochiometric ratio (14. REPLACE CATALYTIC CONVERTER. In order to protect the environment and prevent you and your family from being exposed to poisonous gases, every vehicle is required to have a . Also, you will see the similar signs when there is a very rich fuel mixture in the oil tank. It may seem too easy, but using higher-quality gas can make a big difference. Sulfur smell. In fact, vehicles didn’t even have catalytic converters until 1975. I dont want to replace both sensors if they arent the problem. " So I guess for the week that I wanted to rotella before I got word back from Shell now just cost me the $20+ for the oil I bought. Make sure to spray into the cat from both sides. Which means an older model car may not have one. Method 3: Use High-Octane Fuel and Additives. On the other hand, the muffler is made out of stainless steel or other types of . At CO’s peak, marked by the black cursor, O 2 rises. Rattling Noises when Starting. In modern cars, a bad catalytic converter can cause an engine to run lean by altering the fuel . Another friend . To clean the catalytic converter with sodium hydroxide, you’ll first need to remove it from the vehicle. Then, soak the inside of the converter using a spray bottle. It will also make your Prius easier to sell if you find a Californian buyer. When this type of fuel goes to the engine during the combustion process, a chemical reaction takes place. Aug 04, 2011 #1. Excess of unburned gas caused by a faulty spark plug or a leaking exhaust valve can overheat them. I used temperature gun (infrared thermometer) to check the difference. Vacuum Gauge Test. 00. are fine, then it could be the catalytic converter that’s bad. This helps them warm quickly to the high temperatures where they’re most effective. Poor Engine Performance. Below are oscilloscope traces of pre and post cat oxygen sensors with a good and bad catalytic converter. How to Replace a Catalytic Converter. One of the signs of a bad catalytic converter is the noticeable smell of rotten eggs. Mechanics often misdiagnose a faulty catalytic converter with other components like a bad oxygen sensor or any other sensor. For the catalytic converter to be replaced, it alone can cost on average $2250.


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