What is the reason why the Land Rover Aurora hot car entered the R and D idle cars on 14?

The main reasons are that the engine is out of the cylinder, the timing belt is misaligned, the adaptive value of the oxygen sensor exceeds the standard seriously, the vacuum hose of the intake pressure sensor is blocked, and the internal or external leakage of the engine intake system leads to the idling deviation from the normal value. The control unit continuously adjusts the opening of the idle stepper motor and the idle air valve or throttle according to the signal fed back by the oxygen sensor, so that the idle speed returns to the normal value.

At the moment when the normal idle speed is restored, the system exits the control, the idle speed deviates from the rated speed again, and the control unit is adjusted again, so the idle speed fluctuates regularly.

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In the process of long-term use, some cars often encounter the phenomenon of idle speed (instability), so it is necessary to check whether the solenoid valve of activated carbon tank is faulty; If the solenoid valve is not tightly sealed, or the fuel vapor is not replenished when it should be, and too much air is replenished to the intake pipe when it should not be replenished, it will also cause idling. This fault is very troublesome whether it comes from solenoid valve or electronic control system.

If the vacuum tube of the activated carbon tank is unplugged, the vacuum tube leading to the intake pipe is blocked, so that the activated carbon tank does not participate in the work, which is an emergency treatment measure. If the driving is caused by poor air supply of activated carbon tank, the fault phenomenon will definitely disappear within half a minute.