请问大众途观冷车怠速忽高忽低怎么办？大众途

　　请问大众途观冷车怠速忽高忽低怎么办？大众途观怠速不稳忽高忽低「干货」

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大众途观冷车怠速忽高忽低怎么办

　　首先要排除是不是因发动机某个气缸工作不良导致的发动机抖动，或因怠速过低引起的抖动，如果抖动时发动机转速不是太低，转速正常，就说明是某个缸工作不良，先检查点火系统是否正常，点火线圈、火花塞、高压线是否正常，如果都正常，再检查喷油系统是否正常，检查燃油泵压力是否正常，喷油嘴是否有堵塞和泄露现象。具体处理还需要车主去4s店或是维修店进行检修。

大众途观怠速不稳忽高忽低

　　原因：节气门积碳过多。

　　2.

　　进气歧管或各种阀门泄漏。这种故障直接影响燃油混合质量和燃烧效果。可能漏气的零件,如进气歧管、true 空管、活性炭罐阀、废气再循环(EGR)阀、曲轴箱强制通风(PCV)阀等。,需要逐一检修。

　　3.

　　气门正时故障。气门正时错位、正时皮带安装不正确、进气门和排气门积碳过多、气门弹簧断裂等。,每个气缸的进气量不同,怠速会不稳定。

　　4.

　　三元催化转化器堵塞。三元催化转化器堵塞不仅会造成怠速不稳,还会导致动力不足。

　　【英文介绍/For English】：

　　First of all, it is necessary to rule out whether the engine jitter is caused by the poor operation of a certain cylinder of the engine, or the jitter caused by the low idle speed. If the engine speed is not too low and the speed is normal during the jitter, it means that a certain cylinder is not working well. Check the ignition first. Whether the system is normal, whether the ignition coil, spark plug, and high-voltage line are normal, if all are normal, then check whether the fuel injection system is normal, check whether the fuel pump pressure is normal, and whether the fuel injection nozzle is blocked or leaking. The specific treatment also requires the owner to go to the 4S shop or repair shop for overhaul.