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HOW-TO and NOTES

Optical Vehicle Speed Sensor (VSS)

Installing an Optical VSS pickup.

GM and After-market Ignition Interfacing

A Connection Diagram for Ignition

Allows optional stand-alone operation with 5v pulse out, or ECU advance control by changing ERBG connector.

EEprom for 1227747 GM ECU Conversion

GM ECU mod: Converting the 1227747's PROM.

Use an AT28C64 EEPROM that is easy to erase and reprogram in place of the original 2732 PROM