cbogie Posted November 7, 2023 Report Posted November 7, 2023 repost to engine monitor group. Anyone else seen this scenario???? EDM 900 fuel pressure shows a red X only when boost pump is on. Shows normal indication when running on engine driven pump only. Ideas.?? Sensor going open when at higher pressure?? trying to reach JPI now. Quote
ArtVandelay Posted November 7, 2023 Report Posted November 7, 2023 Is this one of the models with low and high boost? Quote
PeteMc Posted November 7, 2023 Report Posted November 7, 2023 Is there a Max Pressure setting? Maybe when you turn the Boost Pump on it exceeds whatever is set in there as Max. Though I guess it would/should show a Max, not an X. I wonder if the pump causes some sort of turbulence so the transducer doesn't give an accurate reading? (But purely a guess on fluids, no clue on the actual setup.) Quote
ArtVandelay Posted November 8, 2023 Report Posted November 8, 2023 Is there a Max Pressure setting? Maybe when you turn the Boost Pump on it exceeds whatever is set in there as Max. Though I guess it would/should show a Max, not an X. I wonder if the pump causes some sort of turbulence so the transducer doesn't give an accurate reading? (But purely a guess on fluids, no clue on the actual setup.) I thought it was boost pump->engine pump->fuel servo and this is where pressure is measured, so far downstream it should not be effected? Quote
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