Re: HFS-3 on BMW 535d
The HFS4 aquamist systems reads idc and rail pressure. Boost pressure is only used for correction.
For diesel, M50/W50 injection, it rarely needs failsafe as: No flow = loss of power = failsafe. All aquamist system has a flow sensor based failsafe. It will depend on you how you want it integrated if you run water only.
Is the boost pressure controlled by a BCV on your engine?
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Richard L
aquamist technical support
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