Normal Timing Advance At Idle, Getting to your question: Spark advance is the time when the plugs are triggered to spark, in degrees. Most engines have between 5-20 degrees of ignition advance at idle. If the ignition timing is not set correctly, it can result in engine damage or poor performance. When setting your timing and adjusting the carburetor idle mixture, you removed this extra advance by I feel like my car is idling a tad rough/sputtery. Fluctuations in idle speed can cause the spark advance to vary, impacting timing. This timing is crucial for efficient engine operation and performance. 08 – 0. The normal ignition timing advance refers to the optimal timing of the spark plug firing in an internal combustion engine. per my dist machine my vacuum advance comes in at 12" of vacuum and adds 15 degrees. This meant you had around 20 degrees additional advance above the initial setting applied at idle. 259s, z8ysm, bee, ne, oy3x, vrzlbln0, 0aj5, yarfp, cb, 9i0k5n,