Ignition System - HEI: Testing: Notes

CAUTION: During testing procedures, the following precautions must be observed. DO NOT ground tachometer terminal of distributor connector. Disconnect ignition switch connector at distributor before making compression checks.

NOTE: To remove spark plug wires, twist boot 1/2 turn and pull on boot (not on wire). When using a timing light, connect at plug end of number 1 spark plug wire (DO NOT pierce plug boot).

Check that wiring connector is properly attached to connector at side of distributor cap, and that spark plug leads are properly connected at both ends before continuing with test procedures.