Re: BMW N20 EWG - HFS4v2 install
1. The blue harness does two things, early water level warning and turning the water pump on. It is not advisable to disregard it. The system is designed to be truck mounted, not exception because the pump is not water proof.
2. All correct
3. If you car has no lag, use IDC as a trigger. Our system does not trigger according to boost pressure as it is different in each gear. Trigger via IDC% is very reliable as it represents engine load more accurately. Boost without RPM or Throttle reference is meaningless. You need to get your head around this.
4. Do do not have an instruction booklet?
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Richard L
aquamist technical support
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