Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Test 15, Ignition Secondary Display

1. Connect oscilloscope to view display of the ignition secondary system.
2. Slowly raise engine speed to 2,000 RPM.
3. Check for firing spikes which are appreciably lower or higher (5KV) than other cylinders.
4. Normal firing spikes should be approximately 15 KV.
5. Expand pattern to inspect individual firing spikes. If all spikes are below or above specifications, check rotor, distributor cap, spark plugs, plug wires or coil wire to distributor cable.