Tiida's spark plug has been replaced with a new one, and the air inlet has been cleaned. Is it detected by the computer?

If the idle speed is unstable, you need to repair the computer to match or repair the computer to learn to match the throttle manually.

Mode 1:

After the vehicle is started, if the idle speed is below 1200 rpm and above 700 rpm, use maintenance equipment (generally X200, X300, X43 1, etc. ), such as general maintenance equipment X43 1.

When the ignition key is turned to the second gear and the instrument light is on, the vehicle will not start. Use the OBD- 16 pin diagnostic connector to connect the OBD interface in the lower right corner of the vehicle cab, connect the equipment, enter the diagnosis page, select the vehicle model, model year and displacement, enter the engine system, read the fault code, and clear the fault code if there is any unexpected fault (if there is any fault that cannot be cleared, confirm that there is no fault code after maintenance, and then proceed to the following steps). After clearing the fault code, exit the special function, match the throttle, start the engine to run at idle speed for normal water temperature, and the cooling fan does not work (the engine idle speed is lower than 1200 rpm and higher than 700 rpm, which can be successful, and the engine idle speed is higher than 1200 rpm, which can be idle learning), and the learning time is about 5- 10 minutes.

Mode 2:

After the vehicle is started, the processing speed is higher than 1200 rpm. Use maintenance equipment to cooperate with manual work. Take the general maintenance equipment X43 1 as an example.

When the ignition key is turned to the second gear and the instrument light is on, the vehicle will not start. Use the OBD- 16 pin diagnostic connector to connect the OBD interface in the lower right corner of the vehicle cab. After connecting the equipment, enter the diagnosis page, select the vehicle system, model, model year and displacement, and then enter the engine system. Read the fault code. If there is any unexpected fault, clear the fault code. After clearing the fault code, exit the special function selection, match the throttle and start the engine to run at normal water temperature. The cooling fan doesn't work either. When the idle speed is higher than 1200 rpm, the maintenance equipment cannot learn successfully, and the engine speed can be manually reduced to below 1200 rpm.

One. Execute the engine cylinder-cut mode, unplug any connector of the four ignition coils, and let it do cylinder-missing work to reduce the speed.

Two. Cut off the engine oil, unplug any joint of the four injectors, and let them work without cylinder, so as to reduce the speed.

After choosing either of the above two methods, click Idle Learning, and the learning time is about 5- 10 minutes. After the display on the equipment is completed, turn off the engine, connect the plug of forced deceleration, and then start the vehicle, and you can succeed. If it fails, repeat the second mode, and if the idle speed drops below 1200 rpm, repeat the 1 mode.