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Discussion Starter · #1 ·
im just curious what it does, i see it fits on the exhaust cam so i assume it sees cam timing but what does it do exactly ?

thanks
 
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yep thats correct. The YB motor has a phase sensor in the dizzy which tells the ECU when No1 cylinder is going to fire , where as the RB CAS tells the TDC and the phase signal from 1 unit. They do wear out thou , the opitical sensor inside the CAS seems to give out incorrect information as they get older.
 
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