Liquid engines won't work with throttle up

[Epic Peter Griffin]

I unlocked liquid engines and they were working but now when i put throttle up, they flash the fire and stop. I restarted the game twice and they won't work in sandbox either and after I launch the rocket in the VAB it dosen't show delta v

Edited April 15, 2022 by Epic Peter Griffin

[darthgently]

Going on little information, it sounds like they have no fuel and are "flaming out".  Verify the type of fuel the engines require and verify the type and amount of fuel you have in your tanks.   After that, make sure your engines are connected directly to the nodes at the bottom of tanks as a reality check.  Finally, in the VAB, you can R-click on an engine and select "show fuel flow" or similar and it will show you if the engine has access to fuel.

[Epic Peter Griffin]

I am building the same liquid fuel tanks as i was when they worked and they don't work and if i load an old working liquid rocket and don't change it it also dosen't work. I will try to delete and redownload the game and see if it works

Edited April 15, 2022 by Epic Peter Griffin

[Vanamonde]

Do you have throttle mapped to another control, such as a joystick slider? Maybe they are conflicting with each other. 

[Epic Peter Griffin]

no i have default controls

[Epic Peter Griffin]

I found out the fuel tank had no oxidizer in it thanks for help

[Vanamonde]

Yeah, that'll do it.