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What are the reasons for the slow acceleration of the Nissan Sylphy?

2 Answers

LaJonathan

08/30/25 3:01am

Nissan Sylphy's slow acceleration can be attributed to the following reasons: 1. Clutch slipping: Clutch slipping mainly manifests as the vehicle's inability to increase speed in sync with the engine's RPM during acceleration. The engine's power is not fully transmitted to the driving wheels, resulting in weak driving performance, especially noticeable when going uphill. 2. Engine issues: The power source comes from fuel combustion, and the engine is responsible for supplying fuel and converting chemical energy into mechanical energy. Therefore, when the car experiences weak acceleration or slow speed increase, the engine system should be a key focus for inspection. 3. Engine fuel system malfunction: Problems such as a faulty fuel pump or clogged fuel filter can lead to a decrease in engine power.

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MacPaisley

09/11/25 7:08am

I've been driving the Sylphy for a while and have also experienced the slow acceleration issue. My car has a 1.6L naturally aspirated engine, which feels fine for city driving, but struggles with highway acceleration. During one maintenance visit, the mechanic found severely aged spark plugs causing incomplete ignition and insufficient power output. Additionally, the air filter hadn't been replaced for a long time and was clogged with dust, affecting the engine's air intake efficiency. The Sylphy's CVT transmission responds relatively slowly when pressing the accelerator, not as direct as a manual transmission. After regularly replacing filters and spark plugs, plus maintaining proper tire pressure, I noticed significant improvement in acceleration. Don't neglect routine maintenance - small components can accumulate problems if not replaced timely. If acceleration remains consistently slow, it's best to get a comprehensive check at the 4S shop; the transmission fluid might need replacement too.

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