EST Signal
Terminal "A" triggers the HEI module. The ECM does not know the exact timing, but it will advance or retard timing from the point when it receives a reference signal. Timing is determined by crankshaft sensor and is not adjustable.
Terminal "A" triggers the HEI module. The ECM does not know the exact timing, but it will advance or retard timing from the point when it receives a reference signal. Timing is determined by crankshaft sensor and is not adjustable.