Distributorless Ignition System

The Distributorless Ignition System (DIS) uses several electronic sensors instead of a distributor. It also uses one coil for every two cylinders. The components in the system are: 1. Crankshaft timing sensor 2. Camshaft sensor 3. DIS Ignition module 4. Ignition coil packs The crankshaft timing sensor consists of a single Hall effect magnetic switch activated by 3 vanes on the crankshaft damper and pulley assembly. This sensor sends a signal that feeds timing and rpm information to the DIS and EEC-IV module. The camshaft sensor is driven by the camshaft; it provides information on the cylinder position for the ignition coil and fuel system. The DIS ignition module receives the signal from the crankshaft sensor and the camshaft sensor. It also receives the spark signal from the EEC-IV module. This module's major purpose is to use the information supplied to it to control the ignition coils. The reason it does this is to ensure that they fire in the correct sequence. The DIS module also controls the engine dwell. The ignition coil pack has multiple ignition coils. The DIS module controls these coils by means of coil leads. The ignition coils fire two spark plugs simultaneously; one on the compression stroke and one on the exhaust stroke.