3 and 4 wire crank sensor
- Thread starter buickGTP
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turbodave231
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- May 24, 2001
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The 4 wire is a dual sensor. It has a 3X and a 1X signal. Look closely at the BMS balancer. They have two trigger wheels.
turbodave231
Moderator
- Joined
- May 24, 2001
- Messages
- 2,287
Some of the early batch fire systems used the 1X signal as a sync signal to the ignition module in place of a cam signal. No real advantage. You can use a 4 wire sensor in place of the 3 wire, you will just ignore the 1X output pin.
