DELCO-REMY Electronic Spark Selection: Description

The Electronic Spark Selection (ESS) ignition system is used on Cadillac Eldorado, Seville, and California DeVille and Brougham. System is able to advance or retard spark curve under certain operating conditions. This improves fuel economy at cruising speeds, reduces exhaust emissions and improves hot engine restarting. System consists of an electronic decoder and a modified high energy ignition system distributor with a 5-pin module.