Tune-Up - 4-CYL: Testing: Distributor

Federal 1.6L VIN C engines are equipped with a Delco-Remy High Energy Ignition (HEI) system. The distributor used with the HEI system contains both centrifugal and vacuum advance mechanisms.

1.6L (VIN 4) engines are equipped with Nippondenso Integrated Ignition Assembly systems. The distributor contains both coil and ignition module, and has centrifugal and vacuum advance mechanisms.

Beginning in 1987, 2.0L (VIN 1) and 2.5L engines use a Direct Ignition System (DIS). This system is similar to the C(3)I Ignition used on some Buick-built V6 engines. Ignition timing information is taken from a crankshaft mounted timing disc by a magnetic sensor.

All other models with distributors are equipped with the Delco-Remy High Energy Ignition system with Electronic Spark Timing (HEI-EST). The HEI-EST distributor is not equipped with centrifugal or vacuum advance mechanisms since all advance is controlled by the Electronic Control Module (ECM).