I bough a vacuum controlled exhaust valve and wanted to use my Emu black to control its activation… in two ways.
A latched on-off (I have this switch already) OR momentary (one press on, press again off) Switch
ECU controlled opening when the engine is full throttle Or ideally, full throttle above X revs
The other issue is… the unit is 433mhz remote controlled and I have NO idea how to wire a switch in to the valve control unit’s PCB board itself. So I may have to simply wire the ecu to the ‘on’ momentary and ‘off’ momentary switches on the transmitters (key fob) dongle. Therefore I kinda need the ECU to have a momentary switch output (replicating pressing the on/off buttons on the remote)?
OR am I going about this in the totally wrong way?
I’ve played with something similar, all from china so probably the same actually.
Is there a little solenoid or motor in the case? can you cut those wires and put the ecu in control of them via a relay?
Then a switched input from the button to the ecu
probably an analog input on ecu from the original motor in the box wiring
Aux output from ecu to a relay controlling pump and solenoid etc in box
It DOES have the solenoid, that releases pressure, when switched off. But I don’t think the above solution will work.
Annoyingly, the board has a 5v board mounted pressure switch, on the PCB, that triggers the pump motor (on and off) based on a set vacuum pressure (so the motor isn’t just pumping the whole time). But that switch only triggers when the ‘on’ button of the remote is pushed.
But that did make me think… Could I use hysteresis trigger, based on the trigger voltage of that switch, to trigger the motor on and off, when the switch is set to ‘on’. That way the ECU controls the pump motor, but the pump only comes on if the system loses vacuum pressure (so the motor doesn’t burn out)?
Then somehow trigger the solenoid, when the switch is set to off, which would empty the pressure in the solenoid, but not allow the pump motor to run?
Man… my head hurts… I am soooo not in my skills wheel house
This could be embarrassing… but something like this:
I was hoping to use this…mainly because I have it…and it would be pretty clean having the vacuum pump unit, back in the boot and only running wire from the ECU.
BUT I am now skewing strongly toward the Mac valve now and vac reservoir. Given the PCB is a bit of a nightmare to work around. I do Have after market ITBs, but the vacuum block that came with it does come with some spare outlets.
For anyone doing this… @ProperTuningOG’s response is probably the way. But because I already have a pump… I found the way to make it work. I purchased a 12v vacuum switch. I just bypass the PCB for tis part and the the whole thing works just as I want. It only cost AUD$8 and a tiny bit of soldering. DISREGARD MY STUPID WIRING DIAGRAM… that ain’t how I will do it.
