... engine performance；发动机性能 engine performance check；发动机性能检查 engine performance load test；发动机性能负荷试验 ...
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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。
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.
燃油泵的压力和流通能力可以用专门的仪器进行检查。泵油压力下降可引起供油不足，并降低发动机的性能。
Fuel-pump pressure and capacity can be checked with special gauges. Low pump pressure will cause fuel starvation and poor engine performance.
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