What are the causes of poor engine acceleration?

[BentleyLee]

Engine acceleration issues are primarily caused by incorrect ignition timing and low fuel pressure. Below are partial explanations for poor engine acceleration: 1. Incorrect ignition timing: Air leaks in the intake system; Malfunctioning throttle position sensor or mass airflow sensor; Poor injector performance; Abnormal operation of the exhaust gas recirculation system; Weak ignition signals, etc. 2. Diagnostics: Perform fault self-diagnosis to check for trouble codes. Malfunctions in components like the mass airflow sensor or throttle position sensor can significantly impact vehicle acceleration performance. Identify the root cause based on displayed trouble codes. Verify ignition timing.