MrMarty51
Well-Known Member
I installed two sending units from GloShift for their 0 to 30 PSI gauge.
One sending unit at the AirDog lift pump and the other hooked into a swivel JIC adapter fitting at the injection pump.
I have never been able to get a good reading from either of the sending units, thought it was a bad unit so ordered another SU and installed it with the same results.
Once in a while there would be a fairly accurate reading from the gauge, I think but never real sure.
Yesterday, thought, going to get to the bottom of this.
Having the little mechanical gauge from when I was running the other style pumps, teeed into the hose between the FFM and the IP, hooked in that little gauge with surprising results.
The initial pressure buried the gauge. Not sure how deep.
Backed off the FP regulator screw about a 1/4 of a turn and brought the pressure down to about ten, according to the bouncing needle.
Twisted the adjustment back up about 1/8th of a turn and took the average.
And so, with the pressure spiking and dropping so fast I believe that the GloShift sending units are actually creating electronic spikes and causing the gauge to read at maximum pressure, 30 PSI.
I’m not sure if there is a gauge sending unit that could, or would eliminate the spiking from the gear-rotor pump.
Anyone have any advice ?
One sending unit at the AirDog lift pump and the other hooked into a swivel JIC adapter fitting at the injection pump.
I have never been able to get a good reading from either of the sending units, thought it was a bad unit so ordered another SU and installed it with the same results.
Once in a while there would be a fairly accurate reading from the gauge, I think but never real sure.
Yesterday, thought, going to get to the bottom of this.
Having the little mechanical gauge from when I was running the other style pumps, teeed into the hose between the FFM and the IP, hooked in that little gauge with surprising results.
The initial pressure buried the gauge. Not sure how deep.
Backed off the FP regulator screw about a 1/4 of a turn and brought the pressure down to about ten, according to the bouncing needle.
Twisted the adjustment back up about 1/8th of a turn and took the average.
And so, with the pressure spiking and dropping so fast I believe that the GloShift sending units are actually creating electronic spikes and causing the gauge to read at maximum pressure, 30 PSI.
I’m not sure if there is a gauge sending unit that could, or would eliminate the spiking from the gear-rotor pump.
Anyone have any advice ?
