gjw@clyde.UUCP (Gregory J. Wroclawski) (01/05/85)
The 3.8 liter V-6 engine with port type electronic fuel injection which is available on some new buicks in 1985 has a distributor-less ignition. The electronic ignition control module which electronically advances ignition timing determines which of the three coils to fire depending on signals from crankshaft position sensors on the crankshaft pulley. Each coil fires into a dead cylinder(between intake and exhaust strokes) and a live cylinder(near the top of the compression stroke). This is a trick the Japanese have been using on their 4 clylinder motorcycles for years.