see picture for instructions. it is a distributor problem or wiring/ECM you may have to replace the distributor.
Image (Click to enlarge)
Mar 16, 2017 at 7:21 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.