我厂一位技工在排除一辆天津大发无怠速故障的工作中,检查各缸工作时发现,在中、高速工作良好。当把化油器拆下检查保养,发现怠速调整螺钉头部基本上没有尖锥体,但看不出有损伤痕迹。由于这位技工初次接触大发车型,认为怠速调整螺钉无尖锥是正常的。重新将化油器装好后,试车仍无怠速。于是,取来化油器 I plant a mechanic in the exclusion of a Tianjin Daihatsu no idling fault work, check the cylinder work found that, in the high-speed work well. When the carburetor was removed for inspection and maintenance, I found that the head of idle speed adjustment screw basically no sharp cone, but do not see any traces of damage. Due to the mechanic’s first contact with Daihatsu models, it is normal to assume that no idler adjustment screw is available. Reassemble the carburetor, the test is still idle speed. So, take the carburetor