Wiring forh20 inj press switch? - Saab Performance Bulletin Board - Saabnet.com
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Wiring forh20 inj press switch?
Posted by Ubipa (more from Ubipa) on Mon, 30 Dec 2002 09:50:31
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I need to reconfigure the wiring for my h20 inj system. Initially I had planned to run two wires from a fuel injector harnes to an Aquamist high speed valve w/ a press switch on the +12v wire BL/RD (from the FI ECU relay). This way when press is reached the valve is active. I figured I could then branch the wire from the press switch to the HSV (high speed valve) to a relay to activated the pump. Here's where the problem lies, there's a 12v signal from the ecu on the other fuel injector wire GN/RD that is carried through the HSV which is enough to activate the pump relay. So I need to isolate the relay +12v switch wire from the hsv. Any Idea's? How does everyone w/ an Aquamist 2C system have it wired in (2 press switches?)?
The two press switch method would work but I'd prefer to live w/o the synchronization hassle and more parts. I was thinking about placing a diode in the wire that goes from the press switch to the hsv (after the pump relay branch) so that voltage would only go in one direction and prevent voltage from being sent to the pump relay. Would this effect the operation of the HSV at all? For the electronic wiz's, any suggestion on the diode to go with? I'm wondering what the max draw on the HSV is.
posted by 144.118.132...
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