He should also check ignition wires and connections, adjust idle speed and replace PCV valve. Attention to these service functions will improve engine performance and fuel economy.

还应检查点火连线及其接头，调整空载速度，更换压力调节阀。注意上述维修工作将提高发动机性能并节省燃料。

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Based on the system, a lot of matching test has been done in the 170f engine to check up its performance. Compared with gasoline engine. The LPG engine has lower CO and HC exhaust emission.

在完成系统软、硬件开发基础上，在170f发动机上进行了试验研究，结果表明LPG发动机同原有汽油发动机相比，CO和HC的排放均有较大的改善，但也存在动力性下降问题。

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