What sensors influence ignition timing?
What sensors influence ignition timing? The manifold absolute pressure (MAP) sensor measures intake vacuum, which the PCM also uses to determine engine load. The MAP sensor's input affects ignition timing primarily, but also fuel delivery. Knock sensors are used to detect vibrations produced by detonation. What should the ignition timing be on a Ford 351? Igniton timing should be checked two ways at 2,500 to 3,500 rpm: vacuum advance connected and disconnected. Total ignition timing with vacuum advance connected should be no more than 36 degrees BTDC. At idle, it should be 6 to 12 degrees BTDC. Where is the...