• No spark conditions in Chevy HEI can be caused by the coil or control module. Since you have already replaced the coil, move on to the control module which is located under your distributor cap. Have it tested at a parts store. Rarely, the ignition switch (in the column) or the fusable link in the hot wire to the distributer (red wire that goes to the BAT terminal on the dist.) will be the culprit. Make sure you have 12 volts going to the distributor.

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