Aquamist HFS-3 and MINI Tank GB

[Howerton Engineering]

(01-03-2012 12:22 PM)BostonR56S Wrote:  Jeff, I experience this sound on shutdown too, sometimes. But lately I haven't been hearing it. However, now hearing that its the pump activating for a split second, maybe this is why I had the pooling in the FMIC outlet. The checkvalve has stopped and bubbles forming in the hose upon sitting for a few hours, and the fmic is only oil now, so the checkvalve worked regardless.

(01-03-2012 12:08 PM)Howerton Engineering Wrote:  etalj was discussing this with me as he stated his was doing the same. This happens when the two power sources power down at different times. Basically, the fuel injector power is on a second longer than the fuse power.

The red wire of the gray connector is what arms the entire system, if it goes off first, or at the same time as the red control power all is fine. If the red wire of the gray connector is on longer than the molex power, then the systems master relay is held on while the power/ground reference of the molex is lost. This is triggering the pump relay for a split second.

The long and short is, we may need to find a different fuse to pull power from. etalj was pulling power from the cigarette lighter, and while not the best power source for the system, didn't have this power issue. I don't remember Sil88 car doing this( my memory could be wrong) when we installed it so I can't tell what maybe different on the other installs.

We will try to get this sorted as soon as we can get some feedback.

It sounds like the pump is pulsing for a second, but the CV won't stop the fluid if the valve was pulsing at the same time. It would blow right past it.

So it appears it's just the pump jogging and the valve is staying shut.