Aircraft engines run but fail to consume any fuel on the modern fuel system

[MSFS 2020] Bug Reports Aircraft
1

Version: SU 13

Frequency: Consistently

Severity: Blocker

Context: In custom aircraft, while spawned onto runway

Bug description: With my aircraft I have a functioning fuel system, where every line to the engine is pressured and fuel is contained inside of the lines. However, the fuel level never changes, and there is no fuel flow within these lines. Additionally, the engines do not consume any fuel whatsoever, they will continue to run and combust even when every tank is completely empty. The pumps that supply fuel to the aircraft from the feed tank are not on, yet it will still continue to run.
There are no fuel lines that connect to the right engine, and yet that too will run

image
image900×627 59.3 KB

image
image508×841 7.66 KB

Repro steps: Unsure on specific repro steps, if requested I can provide an aircraft package

2

I forgot to include this, but this is the fuel system settings:

[FUEL_SYSTEM]
Version = Latest
Tank.1 = Name:LeftFeederTank#Title:Left Feeder Tank#Capacity:38#UnusableCapacity:0#Position:2.169525,-4.580511,3.106635#PressureCurve:1#OutputOnlyLines:LeftFeedToLP1,LeftFeedToLP2#InputOnlyLines:LeftOuterJetToFeed,LeftInnerJet1ToFeed,LeftInnerJet2ToFeed#DropTimer:0#Priority:0
Tank.2 = Name:LeftInboardTank#Title:Left Inboard Tank#Capacity:135#UnusableCapacity:6.86#Position:2.211019,-12.049489,3.134019#PressureCurve:1#OutputOnlyLines:LeftInnerToJet1,LeftInnerToJet2#DropTimer:0#Priority:1
Tank.3 = Name:LeftOuterTank#Title:Left Outer Tank#Capacity:144#UnusableCapacity:7.31#Position:1.765561,-18.957495,2.983735#PressureCurve:1#OutputOnlyLines:LeftOuterToJet#DropTimer:0#Priority:2
Tank.4 = Name:RightFeederTank#Title:Right Feeder Tank#Capacity:38#UnusableCapacity:0#Position:2.169525,4.580511,3.106635#PressureCurve:1#DropTimer:0#Priority:0
Tank.5 = Name:RightInboardTank#Title:Right Inboard Tank#Capacity:135#UnusableCapacity:6.86#Position:2.211019,12.049489,3.134019#PressureCurve:1#DropTimer:0#Priority:1
Tank.6 = Name:RightOuterTank#Title:Right Outer Tank#Capacity:144#UnusableCapacity:7.31#Position:1.765561,18.957495,2.983735#PressureCurve:1#DropTimer:0#Priority:2
Engine.1 = Name:LeftEngine#Title:Left Engine#Index:1
Engine.2 = Name:RightEngine#Title:Right Engine#Index:2

Curve.1 = 0:0,1:7 ; TANK PRESSURE CURVE
Curve.2 = 0:0,0.55:0.6,0.67:0.7,1:1 ; ENGINE BOOST PUMP PRESSURE CURVE

Valve.1 = Name:LeftFireCock#DestinationLine:LeftFireCockToBoost#OpeningTime:0.15#Circuit:1
Valve.2 = Name:LeftFuelShutoff#DestinationLine:LeftFuelShutoffToEngine#OpeningTime:0.15#Circuit:4
Valve.3 = Name:Crossfeed#OpeningTime:0.15#Circuit:3

Pump.1 = Name:LeftBoostPump1#Pressure:15#PressureCurve:0#DestinationLine:LeftLP1ToLPJunction#Type:Electric#Index:1#PressureDecreaseRate:0
Pump.2 = Name:LeftBoostPump2#Pressure:15#PressureCurve:0#DestinationLine:LeftLP2ToLPJunction#Type:Electric#Index:2#PressureDecreaseRate:0
Pump.3 = Name:LeftEngineBoostPump#Pressure:25#PressureCurve:2#DestinationLine:LeftBoostToHP#Type:EngineDriven#Index:1#PressureDecreaseRate:0
Pump.4 = Name:LeftEngineHPPump#Pressure:50#PressureCurve:2#DestinationLine:LeftHPToFuelShutoff#Type:EngineDriven#Index:1#PressureDecreaseRate:0
Pump.5 = Name:LeftOutboardJetPump#Pressure:2#PressureCurve:3#DestinationLine:LeftOuterJetToFeed#Type:EngineDriven#Index:1#PressureDecreaseRate:0
Pump.6 = Name:LeftInboardJetPump1#Pressure:2#PressureCurve:3#DestinationLine:LeftInnerJet1ToFeed#Type:EngineDriven#Index:1#PressureDecreaseRate:0
Pump.7 = Name:LeftInboardJetPump2#Pressure:2#PressureCurve:3#DestinationLine:LeftInnerJet2ToFeed#Type:EngineDriven#Index:2#PressureDecreaseRate:0

; FEEDER TO LEFT ENGINE
Line.1 = Name:LeftFeedToLP1#Source:LeftFeederTank#Destination:LeftBoostPump1#FuelFlowAt1psi:0.2#Volume:0.1#GravityBasedFuelFlow:0
Line.2 = Name:LeftFeedToLP2#Source:LeftFeederTank#Destination:LeftBoostPump2#FuelFlowAt1psi:0.2#Volume:0.1#GravityBasedFuelFlow:0
Line.3 = Name:LeftLP1ToLPJunction#Source:LeftBoostPump1#Destination:LeftLPJunction#FuelFlowAt1psi:0.2#Volume:0.1#GravityBasedFuelFlow:0
Line.4 = Name:LeftLP2ToLPJunction#Source:LeftBoostPump2#Destination:LeftLPJunction#FuelFlowAt1psi:0.2#Volume:0.1#GravityBasedFuelFlow:0
Line.5 = Name:LeftLPJunctionToFireCock#Source:LeftLPJunction#Destination:LeftFireCock#FuelFlowAt1psi:0.4#Volume:0.7#GravityBasedFuelFlow:0
Line.6 = Name:LeftFireCockToBoost#Source:LeftFireCock#Destination:LeftEngineBoostPump#FuelFlowAt1psi:0.4#Volume:0.24#GravityBasedFuelFlow:0
Line.7 = Name:LeftBoostToHP#Source:LeftEngineBoostPump#Destination:LeftEngineHPPump#FuelFlowAt1psi:0.4#Volume:0.24#GravityBasedFuelFlow:0
Line.8 = Name:LeftHPToFuelShutoff#Source:LeftEngineHPPump#Destination:LeftFuelShutoff#FuelFlowAt1psi:0.4#Volume:0.24#GravityBasedFuelFlow:0
Line.9 = Name:LeftFuelShutoffToEngine#Source:LeftFuelShutoff#Destination:LeftEngine#FuelFlowAt1psi:0.4#Volume:0.24#GravityBasedFuelFlow:0

; LEFT TANK FUEL STUFF
Line.10 = Name:LeftOuterToJet#Source:LeftOuterTank#Destination:LeftOutboardJetPump#FuelFlowAt1psi:0.05#Volume:0.1#GravityBasedFuelFlow:0.03
Line.11 = Name:LeftOuterJetToFeed#Source:LeftOutboardJetPump#Destination:LeftFeederTank#FuelFlowAt1psi:0.05#Volume:1#GravityBasedFuelFlow:0.03
Line.12 = Name:LeftInnerToJet1#Source:LeftInnerTank#Destination:LeftInboardJetPump1#FuelFlowAt1psi:0.05#Volume:0.1#GravityBasedFuelFlow:0.03
Line.13 = Name:LeftInnerToJet2#Source:LeftInnerTank#Destination:LeftInboardJetPump2#FuelFlowAt1psi:0.05#Volume:0.1#GravityBasedFuelFlow:0.03
Line.14 = Name:LeftInnerJet1ToFeed#Source:LeftInboardJetPump1#Destination:LeftFeederTank#FuelFlowAt1psi:0.05#Volume:0.8#GravityBasedFuelFlow:0.03
Line.15 = Name:LeftInnerJet2ToFeed#Source:LeftInboardJetPump2#Destination:LeftFeederTank#FuelFlowAt1psi:0.05#Volume:0.2#GravityBasedFuelFlow:0.03

; Line.6 = Name:LeftLPJunctionToCrossfeed#Source:LeftLPJunction#Destination:LeftCrossfeed#FuelFlowAt1psi:0.4#Volume:0.1#GravityBasedFuelFlow:0


Junction.1 = Name:LeftLPJunction#InputOnlyLines:LeftLP1ToLPJunction,LeftLP2ToLPJunction#OutputOnlyLines:LeftLPJunctionToFireCock```
3

I may have been a bit of a tool here, my assistance settings reset which turned on unlimited fuel

4

Hello @meqolo

No worries, we all got caught at some point.

Regards,
Sylvain