What is surging in an engine?

Surging is when the engine revs change noticeably under constant load and constant throttle (which in theory should result in constant RPM).Click to see full answer. Also, what causes surging in an engine?If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.Similarly, what does an engine surge feel like? A wide variety of issues can prompt an engine surge. The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. People also ask, what does engine surge mean? The surge is the increase in rpm of a stalled compressor. They will stall if airflow is not maintained at the proper angle of attack. Interruption of airflow in jets can be caused by abrupt maneuvering, ingestion of foreign matter, or excessive application of throttle.What is engine surge or hesitation?Hesitation is when your engine misfires, stumbles or lacks power when you accelerate or step on the throttle. The problem often means the air/fuel mixture is not being properly enriched or is going lean, or the ignition system is weak and is misfiring when the engine comes under load or the air/fuel mixture goes lean.