4-Cylinder Ignition Timing: Notes
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 1991 Pontiac Sunbird, 1991 Pontiac Grand Am, 1991 Pontiac 6000, 1991 Oldsmobile Cutlass Cruiser, and 1991 Oldsmobile Cutlass Ciera. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Procedures for timing adjustment are for engines equipped with HEI-EST distributors only. All other models are equipped with either C(3)I, DIS or IDI ignition system. Timing on these systems is not adjustable.