What is the method for throttle body adaptation after cleaning?

[LaFrank]

Throttle body adaptation method after cleaning: Connect the decoder, follow the decoder prompts to clear the original data, then input new actual data to complete the adaptation. Introduction to throttle body: 1. The throttle body is a controllable valve that regulates air intake into the engine, with two types: traditional cable-operated and electronic throttle. In traditional engines, the throttle control mechanism operates via a cable or rod, connecting the accelerator pedal at one end and the throttle linkage plate at the other. 2. After entering the throttle body, air mixes with gasoline to form a combustible mixture for combustion and power generation. The throttle body connects to the air filter at the top and the engine block at the bottom, often referred to as the "throat" of the automobile engine. The responsiveness of vehicle acceleration is closely related to the cleanliness of the throttle body.

[MacDerek]

I've handled quite a few throttle body cleaning and matching cases. After cleaning, the carbon deposits are removed, but the ECU still remembers the old opening parameters, so recalibration is necessary. The easiest method is to disconnect the negative battery terminal for 5 minutes and reconnect it, which resets the ECU. Some models require a diagnostic tool, such as Volkswagen needing VCDS (5053) to access the engine module for basic settings. Japanese cars usually adapt after driving about ten kilometers. Key points to note: Ensure the coolant temperature reaches 90°C before matching, and turn off loads like AC and headlights. Once, when helping a neighbor, he didn't recalibrate after cleaning the throttle body, causing the idle speed to surge to 1500 RPM. It stabilized only after resetting the opening with a diagnostic tool. Having an OBD scanner on hand makes DIY operations much easier.

[PeterLee]

After cleaning the throttle body myself last time, the idle was shaking like dancing. Research showed it needed recalibration. I disconnected the battery for ten minutes, reconnected it, started the engine, and let it idle for 15 minutes, but the RPM stayed at 1200 without dropping. Later, I tried a folk remedy: turn the key to the ignition position without starting, wait 30 seconds until all dashboard lights go off; press the accelerator pedal fully for 5 seconds then release; turn off the key and wait half a minute, then repeat twice. After the third start, the idle stabilized directly at 800 RPM. Procedures vary by brand—American cars can usually be fixed by disconnecting the battery, but French cars are better handled with a diagnostic tool. Before recalibration, ensure the engine is warmed up to mid-range coolant temperature and the voltage is sufficient.

[SerenityLynn]

After cleaning the throttle body, the ECU must relearn the throttle opening. There are three methods: disconnect the negative battery terminal for ten minutes to reset the ECU; manually match using an OBD diagnostic tool; or drive 20 kilometers for adaptive learning. Disconnecting the battery is the simplest method, but some models require specialized equipment. For example, I once matched an old Audi using a cheap Bluetooth OBD adapter connected to a phone app—it took just five minutes. If not properly matched, common symptoms include high idle speed or stalling during cold starts. Ensure the engine reaches operating temperature during the process, and turn off all vehicle electronics to avoid interference.