Need help with twin engines planes!

[fifi]

Hi,

With CEM on, i can start and fly any single engine fighter...but i'm stuck with the twin engines! (BF 110 - JU8

Meaning i can start each engine at a time, it's turning for 3 seconds and then always die whatever throttle i give!

Seems my problem is i can't find to open the tanks...like i do in single engine planes.
I guess there isn't any mixture in those german planes?

I've searched on forum and manual, but nothing about it...help please!

EDIT: Just found out for the 110! It was the tank red levels (left hand side) to push full forward!

But still stuck with JU88...