2. Faulty ignition system: This includes spark plugs, spark plug wires, or ignition coil. If any of these components are faulty or damaged, the spark needed to ignite the fuel mixture can be weak or not occur, leading to hesitation.
3. Air/fuel mixture issues: If the air/fuel mixture is not correctly balanced, it can result in hesitation or rough running. This can be caused by a faulty airflow sensor (MAF sensor), a faulty oxygen sensor, or a vacuum leak.
4. EGR valve: A clogged or malfunctioning EGR valve can cause hesitation during acceleration by affecting the flow of exhaust gases back into the engine.
5. Faulty turbocharger or wastegate: If the turbocharger or wastegate is not functioning properly, it can affect the engine's ability to build boost pressure, leading to hesitation during acceleration.
6. Faulty sensors: Various sensors play crucial roles in the engine's operation. If any of these sensors, such as the crankshaft position sensor or camshaft position sensor, provide incorrect signals to the engine management system, it can cause hesitation or stalling.
