Air Gap
WARNING: This page is about a different car, the 1993 Isuzu Pickup and 1993 Isuzu Amigo. However, it is still accessible from the selected car via links, so may be relevant.
Using a non-metallic feeler gauge, measure air gap between reluctor and ignitor projections. Loosen screws and move ignitor to adjust air gap to .012-.020" (.30-.51 mm). Tighten screws and recheck gap.