Why does the Teana not respond when accelerating at high speed and lack power?

2 Answers
VonGianna
09/05/25 6:44am
Teana stepping on the accelerator without acceleration and lacking power is due to fuel quality and fuel supply system issues. Here are the relevant explanations: 1. Fuel quality: Problems with various types and brands of fuel can lead to unclean fuel lines. 2. Fuel supply system: Issues with the fuel lines from the fuel tank to the internal combustion engine. Consider whether there is blockage or rupture, or if the fuel filter needs replacement. The failure rate of the engine can basically be disregarded because engine technology is already very mature. Consider fuel type and quality issues, whether the fuel filter is original, and whether it needs replacement.
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SanValentina
09/17/25 7:01am
I also experienced the issue of no response when stepping on the accelerator while driving my Teana on the highway. It was quite frustrating and is usually related to the fuel system or ignition system. It could be due to insufficient fuel pump pressure causing poor fuel supply, or a clogged fuel filter restricting fuel flow. There are also ignition-related problems, such as aged spark plugs failing to ignite properly, leading to weak acceleration. Last time I checked, I noticed abnormal noise from the fuel pump, and after testing at the repair shop, replacing it with a new one solved the problem. Don’t overlook the air intake system either—a dirty air filter can restrict airflow, and a faulty throttle position sensor can disrupt ECU signals. I recommend consulting a professional mechanic to read the fault codes with a diagnostic tool rather than attempting DIY repairs, which could cause bigger issues. Addressing it promptly can prevent the risk of breaking down on the road.
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