A Vacuum Leak is when there’s a leak somewhere in the engine, allowing unmetered air to enter the intake manifold.
The most common symptoms of a vacuum leak include. An illuminated check engine light, rough running, stalling, increased engine idle (RPM), and a hissing noise from the engine.
Engine Misfire – Rough Engine Idle On GM 4.8L, 5.3L, 6.0L Engines
Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming, more common and getting harder to diagnose. Because, GM V8 engines are very prone, to a rough idle and engine misfire when […]