What is the reason for normal idle speed but inability to accelerate?

[PresleyLee]

Normal idle speed but inability to accelerate may be caused by fuel system blockages, such as injectors, fuel filters, or fuel quality issues. It could also be due to intake system blockages like air filters or mass airflow sensors. Other possible causes include incorrect valve timing, exhaust system blockages, or oxygen sensor failures, which require repair at a 4S shop. Below is an introduction to car maintenance: 1. Introduction to car maintenance: Car maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the car, also known as car servicing. 2. Scope of car maintenance: Modern car maintenance mainly includes the engine system (engine), transmission system, air conditioning system, cooling system, fuel system, power steering system, etc. 3. Purpose of car maintenance: The purpose of car maintenance is to keep the car clean, maintain normal technical conditions, eliminate hidden dangers, prevent failures, slow down the deterioration process, and extend the service life.

[Rocha]

Idle speed is normal but acceleration is weak? I've encountered this situation often after driving for many years. It could be a problem with the fuel pump, insufficient fuel pressure, leading to weak performance when fuel supply is inadequate. Or the fuel filter might be clogged, blocking the fuel line and affecting acceleration. Another possibility is a faulty throttle position sensor, causing unstable signals and making the car unable to recognize the throttle input. Additionally, carbon buildup in the engine's intake tract can reduce the efficiency of the air-fuel mixture. A malfunctioning mass airflow sensor can also have an impact, leading to incorrect calculations. It's recommended to first check simple components like the air filter and spark plugs to ensure they're functioning properly. If that doesn't help, test the fuel pressure or read the fault codes. Don't delay—repairing it late could cause more damage to the engine and cost more. Safety first, address the issue promptly to ensure smooth driving.

[LeJayla]

My car had the same issue last time! The idle was as steady as an old dog, but stepping on the gas pedal had no response, like pushing a rock. It turned out to be caused by low-quality gasoline, which clogged the fuel line—cleaning it once fixed the problem. A friend's old car had an aging fuel pump that couldn't deliver fuel properly. Other possible causes include a dirty throttle body or a faulty mass airflow sensor failing to send signals. If you haven't maintained your car regularly, excessive carbon buildup can also cause trouble. You might want to try switching gas stations or replacing the fuel filter—it only costs a few bucks. If that doesn’t work, use a pressure gauge to check fuel pressure or visit a repair shop to read the trouble codes. Don’t underestimate this issue—losing power during a highway overtake could be disastrous. Once fixed, driving will be smooth and worry-free.

[DiRiley]

Normal idle but poor acceleration is often caused by a weak fuel pump leading to insufficient fuel pressure. A clogged fuel filter can obstruct the fuel supply pathway. A faulty throttle position sensor with interrupted signals may cause inaccurate recognition. It's recommended to first use a diagnostic tool to check for trouble codes, verifying if sensors like the mass airflow sensor are malfunctioning. If the fuel line or injectors are clogged, cleaning them is a cost-effective solution. For severe carbon buildup, use fuel system cleaner. Address issues early to avoid major repairs. Inspect ignition system components like spark plugs to ensure no misdiagnosis. Don't delay—driving safety depends on vehicle condition.