What causes the inability to accelerate the throttle right after starting the car?
4 Answers
Here are the reasons why the throttle cannot be accelerated right after starting the car: 1. Incorrect valve timing, such as poor sealing of intake and exhaust valves. 2. Poor performance, short circuit, or burnout of the fuel pump due to internal or wiring issues, leading to insufficient or stopped fuel supply. 3. Blockage in the intake system, such as the air filter or air flow meter, preventing proper combustion with fuel. 4. Internal engine faults, improper maintenance, premature or abnormal wear, cylinder pressure issues, or other potential problems. 5. Blockage in the fuel system, such as the injector, fuel filter, or poor fuel quality. 6. Abnormal spark plug ignition, aging components, exceeding normal lifespan, carbon deposits, or incorrect model selection (e.g., heat value). 7. Poor performance of the ignition system, such as spark plugs or high-voltage wires.
After starting the car, the throttle cannot be increased, which may be caused by several common problems. For example, the throttle valve is too dirty and blocked, excessive carbon deposits prevent air from entering, causing the engine to suffocate; or the throttle pedal sensor is broken, unable to send signals, leaving the computer unable to receive them and staying idle; additionally, the fuel system may also be at fault, with an aging fuel pump providing insufficient pressure or clogged fuel injectors leading to inadequate gasoline supply; a faulty air flow meter or air intake system leaks can also disrupt the engine's breathing. Worse, a short circuit in the wiring or ECU problems would require professional diagnosis. I recommend first checking the throttle valve—you can try removing and cleaning it yourself, but it's better to have a shop handle it; also check if the fuse is blown. Don't force it to drive, to avoid getting stuck on the road and causing danger. Regular maintenance can prevent most issues, especially during cold starts in winter.
I'm familiar with this issue because my own classic car has experienced it before. The engine starts normally, but the car won't move when you press the accelerator. Common causes include excessive carbon buildup in the throttle body requiring cleaning; malfunctioning accelerator pedal sensors sending wrong signals; weak fuel pump failing to deliver gasoline; possible cracks or blockages in the intake system preventing air flow; or control unit failures causing misjudgment. A quick fix is to open the hood and check the throttle body - sometimes tapping it lightly can provide a temporary solution, but don't count on it lasting. If this happens on the road, turn on hazard lights, pull over safely, and call for a tow truck. Remember to change the air filter regularly to reduce carbon buildup.
There are various reasons why the throttle cannot be increased, such as excessive carbon buildup in the throttle body affecting airflow; a faulty throttle sensor interrupting signals, preventing the ECU from receiving commands; insufficient fuel pressure from the fuel pump; or damaged intake pipes causing air leaks and engine oxygen deprivation. A quick tip: try restarting the engine after turning it off, as this can sometimes reset the system; long-term neglect can easily damage the catalytic converter, leading to more expensive repairs. Using high-quality gasoline regularly can help prevent these issues.
