Town Car V8-281 4.6L SOHC (1991)
information. one is the position of the crankshaft in 10 degree increments. The other is engine rpm or crankshaft speed.
The EDIS module uses this information with the spark advance information from the EEC-IV module to determine ignition coil turn on time.
Base timing is set at 10 +/- 2 degrees BTDC, with the crankshaft sensor as reference, and is not adjustable.
