The DIS system consists of 2 separate ignition coils on the 2.5L engine, a DIS ignition module, a crankshaft sensor, crankshaft ... The DIS ignition system uses a magnetic crankshaft sensor and a reluctor to determine crankshaft position and engine speed. ... Electronic Spark Timing (EST) The EST system is basically the same EST to ECM circuit use on the distributor type ignition systems with EST.
|Title||:||Chilton's General Motors Calais/Grand Am/Skylark/Somerset 1985-92 repair manual|
|Author||:||Chilton Book Company|
|Publisher||:||Chilton Book Company - 1992-09|