What Causes the Engine to Stall When Accelerating?
2 Answers
Reasons for engine stalling when accelerating: 1. Dirty throttle body with contaminants: This condition reduces or causes the throttle plate to stick during acceleration, leading to stalling. The solution is to clean or replace the throttle body and perform throttle matching. 2. Faulty ignition coil, open or short circuit: For ignition coil troubleshooting, when visual inspection and resistance measurement fail to provide accurate diagnosis, replace with a new ignition coil. 3. Clogged fuel filter: Restricted fuel flow during acceleration. Replacing the fuel filter resolves this acceleration stalling issue. 4. Faulty mass air flow sensor: Requires replacement. 5. Fuel pump malfunction.
I've been driving for several years and have encountered the annoying issue of the engine stalling when stepping on the accelerator. Back then, it was due to a faulty fuel pump, causing insufficient fuel supply—when I pressed the throttle, the engine couldn't get enough fuel and naturally stalled. It might have been related to fuel quality; using substandard gasoline could clog the fuel lines and cause poor fuel injector performance. Another possibility is a dirty throttle body with too much carbon buildup, affecting airflow. I remember that time on a suburban road when the car suddenly stalled—it almost caused an accident. Later, at the repair shop, they diagnosed it as a faulty ignition coil causing unstable ignition. It's best to clean the fuel system regularly and use quality gasoline. If this happens, pull over safely first, check fuel pressure and the air filter, and don't ignore it—safety comes first.
