What causes the throttle delay in the Hongqi HS5?

[RowanRose]

The throttle delay in the Hongqi HS5 is mainly caused by the following reasons: First: Fuel quality issues. Owners may choose different gas stations to refuel their vehicles. Due to the imperfect quality supervision system of domestic gas stations, fuel quality varies greatly, often containing excessive impurities. When using such low-quality gasoline, the same amount of fuel injection cannot provide the same power as good-quality fuel. Second: Intake system malfunction. Gasoline needs to be fully burned in the engine to deliver equivalent power. If the actual amount of air entering the engine after pressing the throttle is insufficient or of poor quality, incomplete combustion will occur, leading to slower throttle response. In this case, it is necessary to check whether the air filter, intake valve, intake pipe, and various vacuum hoses are clogged or damaged. Third: Power transmission failure. Power transmission is closely related to the transmission. At this point, a test drive is needed to check for issues such as transmission slippage or gear jamming. Changing the oil is not a solution. Fourth: Signal transmission failure. This is caused by a malfunction of the throttle pedal sensor itself or a fault in the wiring between the sensor and the engine electronic control system. In this case, it is necessary to have an experienced technician inspect the vehicle. Do not let ordinary repair shop mechanics handle it.

[McMariana]

Last time I drove my friend's HS5, I also experienced a situation where I had to wait half a second after pressing the accelerator before getting a response. This kind of delay is mostly the electronic throttle system 'contemplating life': when engine carbon buildup is severe, the throttle response becomes sluggish, or the turbocharger needs time to build up pressure. I specifically checked the repair manual and found that deviations in the mass airflow sensor data can also cause the ECU to calculate the fuel injection amount a beat slower. Overly conservative transmission shift logic can also create a sense of power interruption, especially noticeable during cold starts. It's recommended to first add a bottle of legitimate fuel additive and run it on the highway to clean out carbon deposits, then check if there's any leakage in the turbo piping, and finally visit the dealership to check the throttle opening data—experienced drivers have tested these three steps and found they can solve 80% of throttle lag issues.

[VonAnderson]

From a technical perspective, the throttle lag in the HS5 is primarily due to the excessively long response chain in the electronic control system. When you press the accelerator pedal, the position sensor signal must be processed by the vehicle control unit, which then coordinates with the engine ECU and transmission TCU. Any delay exceeding 0.3 seconds in this process will result in noticeable hesitation. Key areas to inspect include the brake switch signal (the system prioritizes braking safety), the response speed of the turbocharger solenoid valve, and whether the transmission fluid temperature is too high, triggering a protection program. I've repaired several units where the issue was caused by delayed feedback from the oxygen sensor, leading to slow air-fuel ratio adjustment—replacing the sensor made a significant difference. Performing an electronic throttle initialization reset is also worth trying.

[VanAddyson]

I've been driving this car for three years, and the throttle response is sometimes sharp and sometimes sluggish. I've figured out a bit of the trick. It's especially noticeable during cold starts in winter, right? This is a deliberately designed protection strategy! When the transmission fluid isn't warmed up, it upshifts particularly eagerly, and pressing the accelerator hard actually prevents it from downshifting. Also, when the auto-hold function is active, the throttle signal is delayed by 0.5 seconds to prevent jerking. If you frequently fill up with 92-octane fuel from small gas stations, clogged fuel injectors can also slow down the response. The solution is simple: turn off auto start-stop before starting, switch from ECO mode to Sport mode, run two tanks of 95-octane fuel, and the throttle responsiveness will improve immediately. Most of the time, you don't even need to go to the shop for repairs.