problem with separators and decouplers

[Spacemen2.4]

Hello. This is my second day playing ksp. as the title says i have problems with those parts. After a few sucessful basic builds i wanted to build something advanced, and i decided to put a few separators / decouplers. But for some reason,
when i accelarate the engine and press space to start it, it just activates the separators and decouplers and the whole ship becomes unusable. Im testing the parts with a 3 part spaceship: a pod, a liquid tank and a behemoth engine. i put 1-1 seperator on the ends of the liquid tank and when i want to start the engine the spacebar just activates the 2 separators  one after another. No matter in what order they are in the bottom left corner the engine wont start.

[Echo__3]

If you are using engines that require a liquid fuel, then you will need to throttle up (Z key).

[Spacemen2.4]

Hi. i already wrote in my post that i accelarate my engine. after the throttle is on max i press space to take off but it just activates the  separators and tha pod falls off.

 

13 minutes ago, Echo__3 said:

If you are using engines that require a liquid fuel, then you will need to throttle up (Z key).

[Nazalassa]

You should check your staging, in particular make sure that the little "separator" icon is in a stage above the one the "engine" icon is. If not, the engine will be decoupled, and as it doesn't have LF to use (it's disconnected from the ship now) it won't do anything.

Another guess is that, if your separator is between the fuel tank and the engine, fuel from the fuel tank can't go in the engine; if your separator is between the fuel tank and the engine, right-click the separator and click "enable crossfeed", which will allow the fuel to go from the fuel tank, through the separator, to the engine. Don't forget to check your staging too!

I hope that helps.

[Director_Valle]

Chances are that the staging is improperly set, could you please share an image of your vehicle in the VAB?.

[Spacemen2.4]

5 hours ago, Nazalassa said:

You should check your staging, in particular make sure that the little "separator" icon is in a stage above the one the "engine" icon is. If not, the engine will be decoupled, and as it doesn't have LF to use (it's disconnected from the ship now) it won't do anything.

Another guess is that, if your separator is between the fuel tank and the engine, fuel from the fuel tank can't go in the engine; if your separator is between the fuel tank and the engine, right-click the separator and click "enable crossfeed", which will allow the fuel to go from the fuel tank, through the separator, to the engine. Don't forget to check your staging too!

I hope that helps.

Thanks! I enabled crosfeed and it worked!