Reasons for Car Jerking After Cleaning the Three-Way Catalyst

[Harrison]

It may be because the three-way catalyst cleaner has damaged the car's fuel system, causing insufficient fuel supply to the car's engine, leading to abnormal engine operation. Here is the relevant introduction to the three-way catalyst: 1. Three-Way Catalyst Cleaner: The three-way catalyst cleaner is the cleaning agent required for cleaning the three-way catalyst. The three-way catalytic converter is a purification device installed in the car's exhaust system. Regular cleaning of the three-way catalytic converter can improve the performance of the car's engine and reduce alarms from the exhaust system's oxygen sensor. 2. Cleaning Time: The car should be cleaned once every 10,000 to 20,000 kilometers. When the car is in a low-temperature state for a long time, causing the three-way catalytic converter to fail to start, the pores of the catalyst may become clogged, affecting its conversion performance.

[BraxtonLee]

After cleaning the catalytic converter, the car suddenly starts jerking. I reckon this is quite common, probably because the cleaning wasn't thorough enough and residues were left behind. Those chemicals got stuck inside the catalytic converter, blocking the exhaust channels and affecting the backpressure. The engine struggles with intake and exhaust, causing it to shake like it's dancing. Another reason could be that the oxygen sensor got contaminated. The cleaning agent stirred up carbon deposits and dirt, which stuck to the sensor, making it unable to accurately measure the air-fuel mixture. The control unit then miscalibrates the ignition timing, causing the car to jerk and run unevenly. Also, if other components were disturbed during the cleaning process—like loosened wiring or the catalytic converter housing not being properly reinstalled—it could lead to air leaks or short circuits, indirectly causing issues. I've encountered similar situations before. Sometimes, restarting the car a few times after parking or idling for a few minutes to let the ECU reset and adapt can help. But if the shaking is severe, it's best to take it to a professional shop immediately to check the exhaust system and ECU learning status. Don't delay too long, or it might damage the engine.

[ChaseLynn]

My car just had the catalytic converter cleaned, and now it's making a sputtering noise, which has been bugging me all day. After some thought, it's probably because the cleaning agent wasn't thoroughly rinsed off, leaving residue that's clogging the converter's mesh holes. This increases exhaust backpressure, causing uneven airflow and making the engine shake. Additionally, the oxygen sensor might have gotten contaminated by the residue, leading to drifting readings that confuse the ECU about the air-fuel ratio. This can cause delayed or uneven spark plug ignition, messing up the combustion process. Another often overlooked issue is improper cleaning methods, like using high-pressure washing that can break and displace the internal ceramic particles, or an aged converter that can't withstand the cleaning impact, making the clog worse. After my own trial and error, I've learned it's best to use the manufacturer-recommended cleaning agent and follow the proper procedure. After cleaning, take the car for a long highway drive to help clear out any debris. If the sputtering persists, check the spark plugs and ignition coils for related issues—don't just focus on the catalytic converter and end up making unnecessary repairs.

[LaPeyton]

After cleaning the three-way catalytic converter, the car suddenly starts shaking. In my opinion, it's mostly because the exhaust pipe is blocked, and the cleaning residue wasn't completely removed, clogging the catalytic converter's filter screen and affecting exhaust, causing unstable engine RPM like it's having a seizure. It could also be that the oxygen sensor got dirty, sending wrong signals, and the ECU can't adjust properly, messing up the ignition timing. A simple solution is to stop the car for a few minutes and restart it to let the system reset and learn the new conditions. If the shaking reduces, try driving for a while. If it still doesn't work, go to the shop to plug in a diagnostic tool to read the fault codes and check if the catalytic converter and related wiring are loose. Remember, cleaning such critical components requires careful follow-up maintenance to avoid more trouble.

[VanAdaline]

After cleaning the catalytic converter, the car suddenly started jerking. I've encountered this before. First, suspect that chemical residues from the cleaning process weren't fully flushed out, leading to deposits clogging the catalytic converter channels and obstructing airflow, causing engine vibration. Secondly, the oxygen sensor might be contaminated, sending inaccurate signals, causing the control unit to incorrectly adjust fuel injection, resulting in abnormal ignition and uneven combustion in the cylinders. Additionally, if the wiring harness or exhaust port was disturbed during the catalytic converter's removal or installation, causing a leak, it could indirectly lead to the issue. Thinking deeper, the catalytic converter itself might be aged and unable to withstand the cleaning impact, causing fragments to shift and jam, or the ECU might need time to adapt to the new exhaust state, making short-term jerking normal. My advice is not to panic. First, reset the ECU and drive a few kilometers to see if it improves. Otherwise, have a technician scan the OBD to check for specific fault codes, while also paying attention to potential related issues like spark plugs or the fuel pump, and repair them promptly to prevent further damage.

[MakaylaMarie]

After cleaning the three-way catalytic converter, the car started making a chugging sound. Initially, I was worried, but quickly identified the cause. It's usually due to cleaning residues clogging the catalytic grid, causing poor exhaust flow and resulting in engine power loss and shaking. Another possibility is the oxygen sensor getting contaminated, leading to incorrect readings and the electronic control system misfiring or messing up the ignition timing. Another factor could be improper cleaning procedures, such as using too high water pressure that damages the catalytic converter's structure or improper disassembly loosening connections and affecting airflow. Later, when I dealt with it, I let the car idle to allow the computer to adapt, warmed it up to expel impurities, and cleaned or replaced the sensor if necessary, which solved the problem. Remember, choosing proper cleaning methods and subsequent testing for smooth exhaust flow can avoid similar issues and maintain good car condition.