Preliminary Information

Obtain an inductive timing light, a tachometer, and a 0-30 in. Hg vacuum gauge before performing test. Visually inspect engine compartment to ensure all vacuum hoses and spark plug wires are properly routed and securely attached. Use vehicle's emission label as a guide.

Examine all wiring harnesses and connectors for insulation damage, burnt or overheated wires, and loose or broken terminals. Ensure that battery is fully charged and that all accessories are off.

For initial (base) ignition timing and RPM specifications, see INITIAL TIMING & RPM SPECIFICATIONS  table.