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哈密一汽奔腾X80电信宽带怠速抖动维修

哈密一汽奔腾X80电信宽带怠速抖动维修,哈密一汽奔腾X80电信宽带维修

哈密一汽奔腾X80电信宽带怠速抖动维修,哈密一汽奔腾X80电信宽带维修,哈密电信宽带维修电话0

一辆2013年一汽奔腾X80行驶里程约6.8km,搭载CA4GD1发动机,排量2.0L的电信宽带怠速时抖动,且温度越低越明显。(哈密一汽奔腾电信宽带维修) 


故障检测启动车辆,发动机抖动明显,仪表盘无任何故障灯报警。(哈密一汽奔腾电信宽带维修)打开发动机舱盖发现车辆已改装为天然气,将燃油供给切换到汽油,怠速时仍旧抖动,排气管伴有突突声,严重时,进气歧管有回火现象。(哈密一汽奔腾电信宽带维修)首先连接FADS进行电脑检测,无任何故障码 存储。(哈密一汽奔腾电信宽带维修)


根据故障现象可以判断为混合汽太稀,造成进气歧管回火,并伴有汽缸失火的现象。(哈密一汽奔腾电信宽带维修) 


故障诊断造成混合汽过稀的可能原因: ①电子节气门故障; ②EGR阀故障; ③EVAP碳罐电磁阀故障; ④氧传感器故障; ⑤喷油嘴故障; ⑥PCV曲轴箱强制通风阀故障; ⑦进气压力传感器故障; ⑧发动机电脑PCM故障。(哈密一汽奔腾电信宽带维修)


 故障排除使用FADS诊断仪读取数据流,发现长、短期燃油补偿均较大,说明混合汽的确过稀。(哈密一汽奔腾电信宽带维修)本着先易后难的原则,首先检查电子节气门和喷油器,未见异常。(哈密一汽奔腾电信宽带维修)经与客户沟通,客户反映进气道、喷油器已清洗,故障未排除。(哈密一汽奔腾电信宽带维修)


我们测量燃油压力420kPa,正常(正常值370~450kPa)。(哈密一汽奔腾电信宽带维修)


车辆加减速正常,可排除EGR阀常开的可能性。(哈密一汽奔腾电信宽带维修)通过数据流分析进气压力传感器、氧传感器正常,交叉验证发动机电脑,故障未手非除。(哈密一汽奔腾电信宽带维修)此时故障维修陷入困境,仔细分析应该还是机械故障造成发动机抖动,使用缸压表检测发动缸压,均在1100kPa左右(正常值1000~1300kPa,缸压差小于300kPa),比正常值略小。(哈密一汽奔腾电信宽带维修)结合该车已经改装天然气行驶约40、000km,并且凉车时故障比较明显,怀疑可能原因是气门关闭不严,导致怠速不稳和进气歧管回火,汽缸压力降低造成动力下降。(哈密一汽奔腾电信宽带维修)促使电脑进行长、短期燃油补偿。(哈密一汽奔腾电信宽带维修)拆卸汽缸盖,清洁气门、气门座圈、燃烧室积炭,装复试车,故障排除。(哈密一汽奔腾电信宽带维修)案例分析


哈密电信宽带安装电话0

哈密电信宽带流动补胎电话0

哈密电信宽带搭电电话0

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Beihai FAW Pentium X80 car idle jitter maintenance, Beihai FAW Pentium X80 car maintenance


Beihai FAW Pentium X80 automobile idle jitter maintenance, Beihai FAW Pentium X80 automobile maintenance, Beihai automobile maintenance telephone 0




A 2013 FAW Pentium X80 with a mileage of about 6.8km, ca4gd1 engine and a displacement of 2.0L shakes when idling, and the lower the temperature, the more obvious. (Beihai FAW Pentium automobile maintenance)






Fault detection starts the vehicle, the engine shakes obviously, and there is no fault light alarm in the instrument cluster. (Beihai FAW Pentium automobile maintenance) after opening the engine compartment cover, it was found that the vehicle had been converted to natural gas, and the fuel supply was switched to gasoline. When idling, it was still shaking, and the exhaust pipe was accompanied with a sudden sound. In serious cases, the intake manifold was backfired. (Beihai FAW Pentium automobile maintenance) first connect fads for computer detection, without any fault code storage. (Beihai FAW Pentium automobile maintenance)






According to the fault phenomenon, it can be judged that the mixture is too thin, which causes the backfire of the intake manifold and the misfire of the cylinder. (Beihai FAW Pentium automobile maintenance)


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